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Related Questions
In physics, a system is defined as the portion of the universe that has been chosen for study. Systems may be complex, such as a whole planet, or simple, such as the water inside a pot. The universe outside the system is called the surroundings. A closed system is one that does not exchange matter with its surroundings and does not experience any outside forces. An open system, on the other hand, can exchange matter with its surroundings and does experience outside forces.
The idea of systems and surroundings was not always part of physics. In 1824, the French physicist Nicolas Carnot applied the idea of systems to thermodynamics. A little later, German physicist Rudolf Clausius added the idea of surroundings. Today, system and surroundings are terms applied also to mechanical systems, as well as used in other scientific fields such as biology.
Examples of open systems are common in everyday life. A car driving down a road is a system. The car engine produces exhaust, which is matter passed to its surroundings. Friction between the car and the road is an outside force that acts on the system. Closed systems are rare in everyday life. They are commonly used in physics laboratories to simplify system analysis and calculations.
So, what questions can help someone decide whether the system under consideration is open or closed? The first question to ask is: Does the system exchange matter with its surroundings? If yes, it is an open system. If no, it is a closed system. The second question is: What is the source of the forces experienced by the system? If all forces originate within the system, the system is closed. If forces act on the system from outside of the system, it is an open system.
QUESTION 1
A student has chosen to study a swinging pendulum. The pendulum would be ____________.
OPTIONS
a system
the surroundings
a universe
a force
QUESTION 2
Which of the following statements describes a closed system?
OPTIONS
It exchanges matter with its surroundings.
Its surroundings act on the system.
It experiences only forces originating from within.
None of the above
QUESTION 3
Which of the following statements about cars indicates that they are an open system?
OPTIONS
Friction is present between different parts of the engine.
The car burns gasoline and produces exhaust.
The engine heats up as the car is driven.
The faster the car is driven, the faster its tires turn.
QUESTION 4
What is the most common use of closed systems?
OPTIONS
To minimize environmental damage
To create more efficient systems
To simplify system analysis
To predict system structure and behavior
QUESTION 5
Which of the following questions is important for deciding whether a system is open or closed?
OPTIONS
Does the system exchange matter with its surroundings?
Is the system composed of multiple parts?
Does the system contain more than one state of matter?
Is the system natural or man-made?
Answers
Answer:
head of the humerus
"Real life" application: As in the balloon, large bodies of water (oceans, ponds, and
lakes) absorb a lot of heat energy with only small changes in temperature.
Why would this benefit organism living in large bodies of water?
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The capability of water bodies to absorb a lot of heat with only a small change in their temperature helps aquatic organisms to maintain temperature homeostasis.
What is homeostasis?Homeostasis is the property of living organisms to maintain a relatively stable range of internal processes such as temperature, pressure, the concentration of nutrients, etc., relative to their external environments.
The normal range of operation of the internal processes is known as the setpoint. Beyond the setpoint, organisms' life may be in danger or they may suffer irreparable damage to their bodies. Thus, the ability to maintain stable internal processes is a survival characteristic in the face of a constantly changing environment.
If the temperature of water bodies changes greatly with the absorbance of heat, this may damage the body temperature regulation ability of aquatic organisms. Thus, it puts their lives at major risk.
With only a little variation in temperature, aquatic organisms would be able to adjust their internal regulatory attribute to ensure that they maintain their normal body temperature.
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variations on sexual reproduction the following is a transcript of an imaginary radio talk show in which four different organisms call in for help with their love lives. read their questions and the responses of dr. morty, the show's host. sift through the information to answer the questions associated with each caller..
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The double-slit experiment demonstrates the wave-particle duality of light and matter, showing that particles can exhibit wave-like behavior and interference patterns.
Caller 1 (the redback spider) belongs to the species that practices sexual cannibalism and internal fertilization.
Caller 2 (the clam worm) belongs to the species that practices external fertilization.
Caller 3 (the Djungarian hamster) belongs to the species that practices internal fertilization and viviparous reproduction.
Caller 4 (the nematode) has the physical anatomy of a simultaneous hermaphrodite, meaning they have both male and female reproductive organs and can simultaneously exchange sperm and fertilize each other.
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Hi ^_^
1. A disease was caused by a bacterium, you want to produce a biological product to kill this bacterium. Which product you have to produce? How can you use your biotechnological knowledge to produce it in high amount?
2. How can you measure the activity of actinomycetes that produce antibiotics?
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Answer:
Answer:
1. The product that must be produced to kill a bacterium —which causes a disease— is an antibiotic, which through biotechnology can investigate the structure of the bacterium and synthesize the chemical formula needed to produce these antibiotics in high amounts.
2. Activity of Actinomycetes that produces antibiotics can be measured by their ability to kill bacteria, in serial studies where bacterial cultures are exposed to Actinomyces.
Explanation:
1. Antibiotics are specific drugs for the treatment of infectious diseases, produced by bacteria. Antibiotics can kill bacteria and prevent their replication.
If a disease is produced by bacteria, the product that is necessary to kill those microbes is an antibiotic, for which biotechnology is useful.
By using biotechnology —a branch of biology that uses technology as a research and development tool— it is possible:
Know the structure, functions and behavior of pathogenic bacterial strains. Investigate which molecule may have bactericidal or bacteriostatic activity.Create chemical formulas -antibiotics- that serve to effectively eliminate bacteria, and cure infectious diseases. The synthesis and production of antibiotics on a large scale, allowing their sufficient availability for use.2. Actinomycetes are microorganisms whose structure is intermediate between a bacterium and a fungus, which is predominantly found in the soil and contributes to its fertility.
From the actinomycetes an antibiotic can be isolated, actinomycin, with selective and limited bactericidal activity.
By means of biotechnology it has been possible to isolate the fraction of the actinomycetes that is effective as an antibiotic, isolate it and synthesize it to be able to produce actinomycin.
The way to test the activity of actinomycetes against bacteria is by performing studies where bacterial cultures are exposed to this bacterium, observing the decrease or disappearance of bacterial colonies.
In one area of the rainforest, there are 5 different species of bats. Bat 1 has extra large ears and excellent hearing, bat 2 has a long snout, bat 3 has fang−like sharp teeth, bat 4 has sharp claws and bat 5 has extra large eyes. Most likely, these bats once belonged to the same species.
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False. The unique attributes of each of the 5 different bats suggest that they are of different species.
What are species?The presence of distinct and unique characteristics among the five different bat species suggests that they likely belong to different species rather than being variations of a single species.
Each bat species has specific adaptations (such as extra large ears, long snout, sharp teeth, sharp claws, and extra large eyes) that are specialized for their specific ecological niche and evolutionary history.
These unique adaptations indicate that these bats have undergone different evolutionary paths and likely belong to different species rather than being variations of a single species.
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A city has set a goal of zero waste. The city wants to focus on recovering resources that are traditionally considered garbage and finding new uses for them. Which of the following would be consistent with the city's zero-waste goal?
A. Reducing the frequency of curbside recycling pickup
B. Providing residents with larger garbage cans
C. Shutting down the wastewater treatment plant
D. Providing artists with discarded materials for their artwork
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Answer:
D. Providing artists with discarded materials for their artwork.
Explanation:
Please brainliest! And Hope this helped you! :D
I also answered first! :D
Answer:
D. Providing artists with discarded materials for their artwork would be consistent with the city's zero-waste goal.
Explanation:
A zero-waste goal aims to reduce the amount of waste sent to landfills, and one way to achieve this is by recovering resources that are traditionally considered garbage and finding new uses for them. Providing artists with discarded materials for their artwork promotes creative reuse and helps divert waste from landfills. Reducing the frequency of curbside recycling pickup and providing residents with larger garbage cans would not align with a zero-waste goal as they would likely increase the amount of waste sent to landfills. Shutting down the wastewater treatment plant would have negative environmental consequences and would not align with a zero-waste goal.
Which image shows the type of leukocyte responsible for antibody production?
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The type of leukocyte responsible for antibody production is shown by option D.
What is leucocyte?We know that a leucocyte is a white blood cell. There are three types of blood cells that we have in the human body and these kinds of blood cells are;
White blood cells
Red blood cells
Blood Platelets
Now we know that the white blood cells are the ones that re responsible for the fighting of the organisms that tend to invade the body. The shape of the leucocytes that act as antibodies also reflects the function of the blood cells.
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Which gas is transported by the circulatory system in humans and is USED BY cells during respiration to release energy stored in food? *A Carbon DioxideB NitrogenC HydrogenD Oxygen
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In order to answer this question, we must remember a bit of cellular metabolism, when mitochondria carry out the process of cellular respiration we can see that in the electron transport chain the final acceptor of electrons is oxygen. Therefore the correct answer for the question is option D oxygen.
In the general population, 1 in 300 individuals is a carrier for Tay-Sachs disease, while 1 in 30 individuals of Ashkenazi Jew descent are carriers. Tay-Sachs also affects 1 in 30 individuals with French-Canadian ancestry, although two completely unique mutations are responsible for the Ashkenazi and French-Canadian mutations.Part A What are the chances of two individuals having a child with Tay-Sachs if both individuals are not of Ashkenazi or French-Canadian descent? Enter your answer using scientific notation. For the multiplication symbol, use an asterisk ). 2.77×10-8 Submit My Answers Give Up CorrectPart B What are the chances of two individuals having a child with Tay-Sachs if one individual is of Ashkenazi descent and one is not? 2.77*10-5 Submit My Answers Give Up CorrectPart B What are the chances of two individuals having a child with Tay-Sachs if one individual is of Ashkenazi descent and one is not? 2.77*10-5 Submit My Answers Give Up CorrectPart D What are the chances of two individuals having a child with Tay-Sachs if the father is an Ashkenazi carrier and the mother is a French-Canadian carrier?
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(1/30) × (1/300) × 1/4 = 2.77 × 10⁻⁵,Chance of mom being a carrier × Chance of dad being a carrier × Chance of having an affected child if both parents are carriers), In the general population, 1 in 300 individuals is a carrier for Tay-Sachs disease, while 1 in 30 individuals of Ashkenazi Jew descent are carriers
Tay-Sachs disease is a rare genetic ailment that is inherited from both parents. It is brought on by the lack of an enzyme that aids in the breakdown of fatty materials. These fatty compounds, known as gangliosides, accumulate to toxic amounts in the brain and spinal cord and impair the nerve cells' ability to function. By the age of 3 to 5 years, the illness is typically deadly, frequently as a result of complications from a lung infection (pneumonia). Juvenile Tay-Sachs disease and other uncommon forms of the disease first manifest in early adulthood or later in childhood (late-onset Tay-Sachs disease).
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How is energy stored in the ATP molecule?
O in the chemical bonds holding the nitrogen base together
O in the chemical bond holding the sugar to the nitrogen base
in the chemical bonds holding the sugar molecule together
O In the chemical bonds holding the phosphate groups together
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I really need help with this
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You are a physiologist on a space flight to a distant planet. You discover intelligent human-like aliens on the planet. You discover that the alien's kidney handles the sugar alcohol mannitol just like our kidneys handle inulin. The data from that experiment are: Plasma level (constant over 24 hrs): 6 g/dL of mannitol 24 hr. urine sample: volume of 2 L, containing 144 g mannitol What is the alien's glomerular filtration rate (in units of ml/min)
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Answer:
1.67 ml/min
Explanation:
Glomerular filtration rate (GFR) is the best overall index of kidney function, which determines the amount of blood that passes through the glomeruli each minute. Human kidneys can filter the inulin, but they cannot reabsorb or secrete this polysaccharide, thereby it is an excellent substance to measure the Glomerular filtration rate (GFR) by measuring its excretion from the kidneys. In this case, alien´s Glomerular filtration rate (GFR) can be calculated as the excretion rate of mannitol/plasma mannitol level >>>
GFR = 144 g/1 day x 1 dL/6 g x 0.1 L/1 dL = 2.4 L/1 day
GFR = 2,400 ml/1,440 min = 1.67 ml/min
Which of the following is a scalar quantity?
⇒velocity
⇒speed
⇒force
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Answer: A. Speed
Explanation: Hope it Helps!
Consider the three most common types of skin cancer. Then, click and drag each label into the appropriate category.
Arises from keratinocytes in the deepest layer of the epidermis
Raised, reddened, scaly appearance
If metastasized, the deadliest skin cancer
Seldom spreads to other tissues
Arises from superficial cells of the epidermis
Caused by mutations commonly found in moles
Most common type
Can spread from the keratinocytes to the ph nodes
Arises from the cells that protect from UV light
Least common type
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The labels for each type of skin cancer are;
Basal Cell Carcinoma:
Most common typeSeldom spreads to other tissuesArises from the deepest layer of the epidermisMelanoma:
If metastasized, the deadliest skin cancerArises from the cells that protect from UV lightLeast common typeCaused by mutations commonly found in molesSquamous Cell Carcinoma:
Arises form superficial cells of the epidermisRaised, reddened, scaly appearanceCan spread from the keratinocytes to the lymph nodesWhat is skin cancer?Skin cancer is an abnormal growth of skin cells often occurring after long exposure to the sun. Basal cell carcinoma is a most common type that rarely spreads to other tissues and comes from the epidermis.
Squamous Cell Carcinoma and melanoma are other types of skin cancers and melanoma is the deadliest of them.
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in physiological Genotype and phenotype disorder male and female in reproductive system
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Both males and females can experience reproductive system disorders. These disorders can be caused by genetic factors, hormonal imbalances, structural issues, infections, or other medical conditions. In males, these disorders may include erectile dysfunction, infertility, testicular disorders, prostate problems, and hormonal imbalances. In females, they may include menstrual disorders, polycystic ovary syndrome, endometriosis, uterine fibroids, ovarian cysts, infertility, and hormonal imbalances. Treatment options vary depending on the specific disorder and may involve medication, hormonal therapy, surgery, or assisted reproductive technologies.
What can insects do that no other arthropods can do
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Answer:
thorax and abdomen, three pairs of legs, antennae
Explanation:
Case Study-Bob
Bob wakes up in the middle of the night with excruciating pain radiating from his left posterior flank that is radiating dow
blood in his urine, and finds it difficult to stand up straight or walk.
1. What is Bob's diagnosis?
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Based on the symptoms described, Bob's diagnosis could be kidney stones or renal calculi.
Kidney stones are hard deposits that form in the kidneys and can cause severe pain when they move through the urinary tract. The excruciating pain originating from the left posterior flank and radiating downward is a characteristic symptom of kidney stones.
The presence of blood in the urine, a condition known as hematuria, is also common with kidney stones due to irritation and injury to the urinary tract.
Bob's difficulty in standing up straight or walking can be attributed to the intense pain caused by the movement of the kidney stone, which can make it challenging to find a comfortable position. The pain often comes in waves and can be described as one of the most severe pains experienced.
To confirm the diagnosis, Bob should seek medical attention for a thorough examination.
The doctor may perform imaging tests, such as a CT scan or an ultrasound, to visualize the kidney stone and determine its size and location.
Treatment options may include pain management, medication to facilitate the passage of the stone, or, in more severe cases, surgical intervention to remove the stone.
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When DNA is copied, sometimes a new, incorrect, base pairing appears within the structure of a new DNA molecule replacing original base pairs. This mistake is called a base-pair ____.
A) Deletion
B) Insertion
C) Point
D) Duplication
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Answer: duplication
Explanation:
In general, coefficients of relatedness are the same in both directions: A mother is as related to her daughter as the daughter is to her mother, for example. In the haplodiploids, this is not always the case. Provide an example to illustrate this.
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Answer:
In bees, The males (drones) genes are 100% the queen's genes (develops from the unfertilized egg), this is haplodiploid, but the females (workers and queens) have 100% of the father's gene but 50% of the mothers (queen)
Explanation:
In relatedness or diploid, both parents share and pass on a complete set of genes to the offsprings, but for haplodiploidy, all the genes of one parent are passed to the offspring excluding the other parent as in the case of drones to queen bees.
I need help asap keep words under 250
For this assignment, you will be writing an abstract of a scientific paper. (25 points)
An abstract is a short, concise summary of a scientific study or literature review.
Be sure you summarize each section of the research paper in your abstract.
Keep your abstract under 250 words
Be concise!
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Title: Effects of Mindfulness-Based Interventions on Stress and Anxiety in College Students: A Meta-Analysis
How to write the Abstract:Background: Mindfulness-based interventions (MBIs) have been increasingly used to address stress and anxiety in college students. However, the effectiveness of these interventions remains unclear. This meta-analysis aimed to evaluate the effects of MBIs on stress and anxiety in college students.
Methods: A systematic literature search was conducted, and a total of 12 studies were included in this meta-analysis. The quality of the studies was assessed using the Cochrane Risk of Bias tool. A random-effects model was used to estimate the effect sizes of MBIs on stress and anxiety.
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1. The article states "plants take up carbon dioxide from the atmosphere and convert it into food. Explain how this supports the law of the conservation of matter
2. New research has shown plants are photosynthesizing more. What percent increase is being shown by plants?
3. This increase in photosynthetic rate, accounts for how much more carbon being removed from the atmosphere?
4. What do researchers propose this increase is a result of?
5. Describe a laboratory procedure researchers used to quantify photosynthetic efficiency.
7. Describe a field procedure researchers use to quantify photosynthetic efficiency.
9. The article talks about the potential "saturation" of carbon dioxide in the atmosphere. Describe what that will mean as it relates to ecological photosynthetic rates.
Article name: New Research Shows Plants Are Photosynthesizing More in Response to More CO2 in the Atmosphere
BY LAWRENCE BERKELEY NATIONAL LABORATORY DECEMBER 17, 2021
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The article states that research has shown a 20% increase in photosynthetic rate by plants in response to more carbon dioxide in the atmosphere.
What is photosynthetic ?Photosynthesis is the process by which plants, algae, and certain bacteria convert light energy from the sun into chemical energy that can be used to fuel the organisms' activities. This process occurs in the chloroplasts of the cells and involves the conversion of carbon dioxide, water, and light into oxygen and glucose.
The law of the conservation of matter states that matter is neither created nor destroyed, and this process of plants taking carbon dioxide from the atmosphere and converting it into food is an example of this law in action.
The article states that research has shown a 20% increase in photosynthetic rate by plants in response to more carbon dioxide in the atmosphere.
Researchers propose that this increase is a result of plants being able to use more of the carbon dioxide in the atmosphere, as there is more available to them.
To quantify photosynthetic efficiency in the laboratory, researchers use a process called Pulse-Amplitude Modulated (PAM) fluorometry. This method uses a light source to measure the rate of photosynthesis in an individual leaf, and is a way to measure the amount of carbon dioxide taken up by the plant.
To quantify photosynthetic efficiency in the field, researchers use a process called gas exchange measurements. This method uses a chamber that is placed over the plant, and measures the rate of photosynthesis by the amount of carbon dioxide entering and exiting the chamber.
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Which type of cell contains an entire copy of the human genome?
Which type of cell contains an entire copy of the human genome?
a human gamete
a human egg
a human somatic cell
a human sperm
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Answer:
Both human gametes, specifically the sperm and egg cells, contain an entire copy of the human genome. Somatic cells, which are all other cells in the body, also contain a copy of the human genome, but they are not involved in sexual reproduction.
Explanation:
Hope this helps!
When doing the experiment of crossing drosophila. What are the prevaution and sources of error ？
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Explanation:
Precautions:
1. Proper handling of drosophila: It is important to handle drosophila with care, avoiding rough handling and exposure to extreme temperatures.
2. Keeping the experimental setup clean: The experimental setup should be kept clean to avoid contamination and the spread of diseases.
3. Selection of appropriate crosses: The selection of appropriate crosses should be done carefully to obtain accurate results.
4. Use of appropriate food and media: The use of appropriate food and media is crucial for the growth and survival of drosophila.
5. Proper labeling and record-keeping: Proper labeling and record-keeping of experimental setups and crosses help to keep track of the results.
Sources of Error:
1. Mutation: Mutation can occur randomly in drosophila, leading to unpredictable and unexpected results.
2. Environmental factors: Environmental factors such as temperature and humidity can affect the growth and development of drosophila, leading to inaccurate results.
3. Contamination: Contamination with other organisms or pathogens can affect the results of the experiment.
4. Cross-contamination: Cross-contamination of different drosophila strains can affect the results of the experiment.
5. Human error: Human error, such as incorrect labeling or accidental mixing of samples, can affect the accuracy of the results.
Hopes this helps
Explain how chemical properties of water relate to its physical properties and make it essential for life.
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The chemical properties of water relate to its physical properties and make it essential for life because one of the most significant molecules on the planet is water. Despite being inorganic, it supports and provides for the life that exists on the planet thanks to its chemical composition and physical attributes.
More than 70% of the surface of the Earth is covered by water, 96% of which is contained in the seas. Water makes up as much as 80% of the body weight of many creatures. The immense ability of water to dissolve a broad spectrum of molecules is referred to as its "universal solvent" status, and it is this ability that makes water such a priceless life-sustaining substance. Water's function as a solvent aids cells in transferring and utilizing chemicals like oxygen and nutrients on a biological level.
Water directly participates in a number of chemical reactions that produce and break down essential cell components. Photosynthesis, the process by which plants make the carbohydrates required by all living things, requires water. Additionally, water helps cells create more giant molecules. Repeating units of smaller molecules make up DNA and proteins. These tiny molecules combine in a process that results in the creation of water.
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*answer below*
Which component of blood protects us from invading foreign material?
-plasma
-erythrocytes
-thrombocytes
-LEUKOCYTES (correct answer)
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Answer:
Leucocytes
Explanation:
Also known as white blood cells.
The question already indicated that the right answer is. I wonder why it's still posted.
The blood component, Leukocytes are immune cells which protects the body from invading foreign material.
What are immune cells?Immune cells are cells in the body which performs the function of protecting the body from invading organisms which cause disease to the body.
The blood contains the immune cells known as leukocytes or white blood cells.
The leukocytes helps to fight invading organisms.
Therefore, the blood component, leukocytes are immune cells.
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which statement is best supported by the observable of the different humerus bones?
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Why can't grass eat rabbits? (and I actually mean that)
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Answer:
Are grass clippings from the lawn mower safe? You should never feed your bunny grass cuttings from lawn mowers. According to The Rabbit House, the heat of the blades and the cutting process causes changes to the grass making it ferment quicker leaving your bunny vulnerable to a poorly tummy.
Answer:
Grass can't eat rabbits because simply plants are producers and not consumers and they make their own food by photosynthesis, while rabbits are primary consumers, depend on plants to get their food and stay alive. Plants are at the lower trophic level of the food pyramid and are said to be the beginning of every food chain.
In order to dilute a solution,you need to____________________
A. Add more of the solid
B. Add more power
C. Find the mass
D. Find the volume
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In order to dilute a solution, you need to add more of the solvent. The correct option is A.
What is dilution?Dilution means decreasing the concentration of the solution, this can be done by adding more solvent without adding more solute. The solute is the solid material and the solvent the liquid.
Thus, the correct option is A. Add more of the solid.
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Please help !! there are pictures and I need to put words in the boxes next to them that match. These are the words
Precambrian
Paleozoic
Mesozoic
Cenozoic
HELP PLEASE 20 points !!
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What are the chambers of the heart called? Select all that apply.
atriums vena
cavas
bronchi
ventricles
***ANSWERS: A AND D***
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atriums and ventricles !
fun fact : they are derived from latin names for parts of a house :D
Answer:
A & D
Explanation:
atriums
ventricles