Answer:
I think its B <3
Explanation:
What is the purpose of the lab, the importance of the topic, and the question you are trying to answer?
Lab: Motion
The purpose of the lab is to show the movement of particles and objects.
The importance of the topic is to show how objects move.
The question you are trying to answer is, What is motion?
What is a Lab?This refers to the place where experiments are done in a controlled environment.
Hence, we can see that although your question is incomplete as it did not include all the parameters of the lab, the lab about motion is all about the movement of particles and objects.
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Explain how the population of rock pocket mice changed fur color over time.
Answer:
Most genes are identical, but dark and light rock pocket mice differ in one gene (Mc1r; 4:55). Data from Data Set 2 show that a mouse's genotype for the MC1R gene affects their fur color. Mice with two copies of allele 2 have the darkest fur.
Explanation:
thank me later
the movements known as dorsiflexion and plantar flexion involve moving the
The movements known as dorsiflexion and plantar flexion involve moving the foot.
Dorsiflexion and plantar flexion are specific movements that occur at the ankle joint, involving the foot. Dorsiflexion refers to the movement of the foot in which the toes are lifted towards the shin, while plantar flexion involves pointing the foot downward, as in standing on tiptoes.
These movements are controlled by muscles located in the lower leg, such as the tibialis anterior and the gastrocnemius-soleus complex. The tibialis anterior muscle is responsible for dorsiflexion, contracting to lift the foot and toes, while the gastrocnemius and soleus muscles are responsible for plantar flexion, contracting to point the foot downward.
The movements of dorsiflexion and plantar flexion are essential for various activities, including walking, running, jumping, and maintaining balance. They allow for proper positioning of the foot during gait and contribute to the overall movement and stability of the lower extremity.
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The complete question is:
The movements known as dorsiflexion and plantar flexion involve moving the _____.
hand.arm.foot.leg.hip.what is a messenger? why its chemical composition is important to determine how it will act on cells.
In biology, a messenger is a molecule that carries a signal from one cell to another. Messengers are crucial for communication between cells and for coordinating cellular responses to changes in the environment. Some examples of messengers include hormones, neurotransmitters, and cytokines.
The chemical composition of a messenger is important to determine how it will act on cells because different molecules have different properties and interact with cells in different ways. For example, some messengers may bind to specific receptors on the surface of a cell, triggering a signaling cascade that leads to a cellular response.
Others may enter the cell and interact with specific intracellular targets, such as enzymes or transcription factors. The chemical properties of a messenger, such as its charge, size, and polarity, determine how it will interact with these targets and ultimately determine its biological activity. Therefore, understanding the chemical composition of messengers is essential for understanding how they function in cells and for developing effective therapies that target these molecules.
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Which biological molecules engage in hydrogen bonding?
DNA
IRON IN THE BLOOD
SALT
PROTEINS
Answer:
proteins
Explanation:
the frequency with which random events occur between two points is a function of the distance between those two points. how do we use this principle to map genes in eukaryotes? be able to calculate and map genes in eukaryotes based upon parental and recombinant progeny experimental results
The principle of frequency of recombination between two points on a chromosome being a function of their distance apart can be used to map genes in eukaryotes.
This is achieved by analyzing the frequency of recombination events between different genetic markers located on the same chromosome. The distance between two genetic markers can be estimated by determining the frequency of recombinant progeny in a cross between two individuals that differ in the alleles of the markers being studied.
The percentage of recombinant progeny can be used to calculate the distance between the markers in units of centimorgans (cM). By analyzing the frequencies of recombination between multiple markers, a genetic map of the chromosome can be constructed, showing the relative positions of the markers and the genes they represent.
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Differentiate between column chromatography and planar
chromatography and give suitable example for each.
Column chromatography separates mixtures in a column with a stationary phase while planar chromatography separates components on a flat surface coated with a stationary phase. Example: column chromatography for plant pigment separation, planar chromatography (TLC) for analyzing ink composition.
Column Chromatography:Column chromatography is a chromatographic technique where the stationary phase is packed into a column and the mobile phase is allowed to flow through it.
The mixture to be separated is introduced at the top of the column, and as the mobile phase passes through the column, different components of the mixture interact with the stationary phase to varying degrees, leading to their separation.
The separation is based on differences in the affinity of the components for the stationary phase.
Example: Separation of different pigments present in plant extracts using a silica gel column.
Planar Chromatography:Planar chromatography is a chromatographic technique where the stationary phase is spread as a thin layer on a flat surface, such as a plate or a sheet of paper.
The mixture to be separated is applied as a spot or a line near the bottom of the plate, and the plate is then developed by allowing the mobile phase to move up the plate by capillary action.
As the mobile phase moves, the different components of the mixture travel at different rates based on their affinity for the stationary phase, resulting in their separation.
Example: Thin-layer chromatography (TLC) is a common form of planar chromatography used in various applications, such as analyzing the purity of pharmaceutical compounds or identifying components in forensic samples.
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The cones of a pine tree open in response to heat from a forest fire. The seeds are released
and are spread over a wide area. Hundreds of pine seedlings per acre grow, along with other
plants. Animals eat the plants, and the forest regenerates. This process is an example of
Answer: I believe it’s an example Natural processes
Explanation: Natural processes are interactions among the plants, the animals, and the environment.
These interactions also include photosynthesis, pollination, decomposition and others, that help create and shape natural communities.
Please help me!
______is plant or animal material used as fuel to produce electricity or heat. An example would be wood or dung.
Group of answer choices
Fossil fuels
Biomass
Uranium
Iron ore
Burning or incinerating trash can cause
Group of answer choices
Air pollution
Thermal pollution
Answer:
1. Biomass
2. Air Pollution
Explanation:
Answer:
Fossil fuels; Air pollution
Explanation:
PLEASE HELP ASAP I WILL GIVE BRAINLIEST!!!!!!!
Question 22(Multiple Choice Worth 3 points)
(06.03 MC)
In cattle, a single gene with two alleles determines fur color. The fur can be red, white, or roan. Roan fur has both red and white hair. Which of the following is true about alleles for fur color in cattle?
The allele for roan fur color is dominant over red and white fur color.
The allele for red fur color is dominant over white and roan fur color.
The roan and white alleles are expressed independently of the other.
The red and white alleles are expressed independently of the other.
Answer:
D
Explanation:
D the red and white alleles are expressed independently of each other. You know this because roan is when both red and white are present. So therefore, because of this, the cow can be red, white, or both depending on what alleles are present.
What determines the amount of
chemical energy a substance has?
Answer:
The chemical energy in a substance is determined by the potential energy of the bonds of the products formed when it reacts
What happens if there is no oxygen in cellular respiration of glucose?
You have sampled a population in which you know that the percentage of the homozygous recessive genotype (aa) is 25%. Calculate the frequency of the "A" allele. *
1 point
0.5
0.4
0.25
0.6
Answer:
.5
Explanation:
Remember that p = dominant allele, q = recessive allele. Use the Hardy-Weinberg equations:
p^2 + 2pq + q^2 = 1 (AA + Aa + aa = 1)
So aa = q^2. Take the square root, and we'll have just q by itself.
√a^2 = √.25 = .5
So the frequency of the a allele (recessive) = .5.
p + q = 1
p + .5 = 1
p = .5
The frequency of the A allele is .5.
Current cell theory resulted from many experiments and revisions to commonly held ideas about where cells come from. Which ideas was not rejected due to scientific evidence?
The idea that cells spontaneously emerge from nonliving matter was rejected due to scientific evidence. The current cell theory is based on the following concepts:All organisms are made up of one or more cells.All cells are capable of self-reproduction.Cells are the basic unit of structure and function in all living things.
Scientific evidence is the empirical data, observations, and findings that support a scientific hypothesis or theory and help establish the accuracy of scientific information. Scientific evidence must be reliable, verifiable, and repeatable to be considered scientific evidence. The idea that cells spontaneously emerge from nonliving matter was rejected due to scientific evidence. Spontaneous generation refers to the notion that life can arise spontaneously from non-living matter.The idea that all organisms are made up of cells and that cells are the basic unit of structure and function in all living things has not been rejected due to scientific evidence.
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1.If some cells in your Gram stain are red/pink rods and some are purple cocci, __________.
If some cells in your Gram stain are red/pink rods and some are purple cocci, __________.
a. the bacteria ferment sucrose
b. you should inoculate an EMB agar plate
c. your unknown is a species of Escherichia
d. your unknown bacterium is a pleomorphic species
e. your smear was not made from a pure culture
2.In a clinical laboratory, all microbes contained in a clinical sample are isolated and identified.
In a clinical laboratory, all microbes contained in a clinical sample are isolated and identified.
A. True
B. False
3.If a yellow halo is present around a colony on a mannitol salt agar (MSA) plate, the bacterium cannot ferment mannitol.
If a yellow halo is present around a colony on a mannitol salt agar (MSA) plate, the bacterium cannot ferment mannitol.
A. True
B. False
1. If some cells in your Gram stain are red/pink rods and some are purple cocci your smear was not made from a pure culture. The correct answer is option(e)
2. It is true that In a clinical laboratory, all microbes contained in a clinical sample are isolated and identified.
3. It is false that If a yellow halo is present around a colony on a mannitol salt agar (MSA) plate, the bacterium cannot ferment mannitol. MSA is a selective and differential agar used to isolate and distinguish Staphylococcus species, most notably Staphylococcus aureus. Mannitol is a fermentable sugar in the agar, while phenol red is a pH indicator. Acid is produced as a result of fermentation by Staphylococcus aureus, which can ferment mannitol. The acid generation causes a reduction in pH, which causes the pH indicator to shift colour from red to yellow. As a result, a yellow halo around a colony on an MSA plate indicates that the bacterium can ferment mannitol.
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a) A patient was admitted to the ICU in December 2000 with an uncharacterized bacterial infection. Based on the data from the study, identify the following: The antibiotic that was most likely to be effective for treating the infection and the antibiotic that was least likely to be effective for treating the infection
According to the data from the study, the antibiotic that was most likely to be effective for treating the uncharacterized bacterial infection in the patient admitted to the ICU in December 2000 is vancomycin. This is because the study reported a high sensitivity rate of the bacteria to vancomycin.
Sensitivity refers to the ability of an antibiotic to effectively kill or inhibit the growth of the bacteria causing the infection. In this case, the high sensitivity rate of the bacteria to vancomycin indicates that it is more likely to be effective in treating the infection. On the other hand, the antibiotic that was least likely to be effective for treating the uncharacterized bacterial infection based on the study data is ampicillin. This is because the study reported a low sensitivity rate of the bacteria to ampicillin. A low sensitivity rate means that the antibiotic is less likely to be effective in treating the infection.
It is important to note that the choice of antibiotic for treating a bacterial infection should be based on various factors, such as the type of bacteria causing the infection, the severity of the infection, the patient's medical history, and the antibiotic resistance patterns in the community. Therefore, it is recommended to consult a healthcare professional for the appropriate choice of antibiotic therapy.
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What is it called when plants lose water through their leaves?
A. Transpiration
B. Percolation
C. Precipitation
D. Condensation
Answer:
A. Transpiration
Explanation:
Transpiration occurs through the stomata of the leaves.
Hope it helps.
Transpiration is the term used when plants lose water through their leaves. transpiration is an important process for plants and for the Earth's water cycle, helping to regulate water balance, transport nutrients, and regulate temperature. Hence option A is correct.
What is transpiration?Transpiration is the process by which plants lose water from their leaves through tiny pores called stomata. Stomata are located on the underside of the leaves, and they allow water vapor to escape from the plant into the surrounding atmosphere. Transpiration is a vital process for plants as it helps to regulate their internal water balance and temperature.
During transpiration, water is drawn up from the soil through the plant's roots and into the leaves. Water is then released through the stomata as water vapor, which evaporates into the air. This process is driven by the plant's need to transport nutrients and minerals from the soil up to the leaves, and to regulate its internal temperature.
Transpiration also plays an important role in the global water cycle, as it contributes to the amount of water vapor in the atmosphere. This water vapor can then condense to form clouds, which can lead to precipitation in the form of rain or snow.
Hence option A is correct.
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Which of the following is NOT a function of carbohydrates? *
Store genetic information
Provides energy
Builds structures
All of the above are functions of carbohydrates
during winter, what factors can reduce the rate of photosynthesis in evergreens such as pine trees? choose all that apply
During winter, lack of water, cold temperatures and reduced sunlight reduce the rate of photosynthesis in evergreen trees such as pine trees.
Pine trees are evergreen trees in that they they are green all year as they do not lose their leaves like other trees. This is because is because they have reduced needle-like leaves which they keep all-year round.
Thus, evergreens are able to photosynthesize even in winter when other trees lose their leaves. However, the rate of photosynthesis is greatly reduced because of winter conditions.
These conditions of factors that reduce the rate of photosynthesis include:
Lack of water: during winter, water is scarce because most water freezes to form ice. As water is needed for photosynthesis, the rate of photosynthesis is reduced.Cold temperature: in very cold conditions, water in between the cells of winter evergreen trees can form ice leading to dehydration. They plants compensate for this by closing their stomata to avoid water loss through transpiration. Closing of the stomata prevents the diffusion into the cell of carbon dioxide, thus limiting photosynthesis.Reduced sunlight: sunlight which is needed for photosynthesis is reduced during winter, thus, reducing the rate of photosynthesis.Thus, during winter, lack of water, cold temperatures and reduced sunlight reduce the rate of photosynthesis in evergreen trees such as pine trees.
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Answer:
A) less sunlight B) colder temperatures
Explanation:
Which of the following describes plant cells but not animal cells?
A. The cell membrane regulates what enters the cell.
B. The nucleus contains the chromosomes.
C. Mitochondria produce energy through respiration.
D. Chloroplasts produce sugar during photosynthesis.
Answer:
Chloroplasts produce sugar during photosynthesis; D would be the answer.
Explanation:
D is the answer because Chloroplasts can only be found in plant cells. Neither A, B, nor C are correct because both plant and animal cells have a cell membrane, nucleus, and mitochondria. By the way, the description of all of the answer choices are correct. You might want to remember them for future.I hope this helps! :)
Please do not vote this, nor give it 5 stars until you know that this answer is right. Also, please read the explanation, it'll help you answer other questions like this!
Nectar is a sugar laden liquid that is very energetically expensive to produce. Why do plants allocate resources to produce it instead of just producing more flowers?A. Nectar is sticky and traps wind borne pollen.B. Nectar provides energy during pollen tube formation.C. Nectar serves as an enticement for insects.D. Nectar provides nutrition to the developing embryo.
Nectar is used by plants to attract insects that will provide the flower pollen or to help the flower to disperse its pollen.
C. Nectar serves as an enticement for insects.
chart for essay on accumulating fossils
Based on the given data about the earliest fossils in the file attached, a summary is given below about fossils:
History of FossilsThe earliest known fossils date back to about 3.5 billion years ago and are imprints of microorganisms. Over time, as living organisms evolved, the number and variety of fossils increased.
The accumulation of fossils has allowed scientists to piece together the history of life on Earth and gain insights into the process of evolution.
This has helped us understand how species have changed over time and how they have adapted to different environments.
The study of fossils has also provided information on ancient climates and geological events. The collection of fossils continues today, providing new insights and discoveries to further our understanding of the natural world.
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An ____ is an controlled study of specific variables
Answer: Experiment
Explanation:
Who is Ross Carr? Who is Ross Carr?
6) What is a mutation? a. Permanent change in the DNA sequence b. Permanent change in the fatty acid sequence c. Temporary change in the DNA sequence d. None of the above
The correct option is D ; None of the above , Mutations are unintentional changes that arise within the base sequence of DNA.
A genetic mutation is a change in the DNA sequence of a gene that results in something distinct. It causes a permanent alteration in the DNA sequence of that gene. Human evolution, or the process of change over years, requires genetic variations. A gene variant is an alteration to the DNA code that makes up a gene. This type of genetic change was previously referred to as a gene mutation, but because changes in DNA do not always result in disease, it is believed that the word gene variant is more accurate.
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What type of forensic technique should be used? Police discovered a badly damaged corpse the body was damaged beyond recognition the police expert however can use DNA _____ to identify the victim?
Answer:
DNA profiling or DNA fingerprinting
Explanation:
DNA profiling is also known as DNA fingerprinting which is widely used in to determine an individual's DNA characteristics.
DNA profiling is widely used in forensic technique in victim or criminal investigations, where DNA is collected that can be hair, blood, body tissue sample or other. The sample is then compared with other suspect's sample which are expected to to be involved to determine whether there is a genetic match and that will help to identify the victim or criminal.
DNA profiling is used to match genetic formation between people which will help to identify parentage testing as genes inherited in the family is almost same and the the victim body will be identified.
Hence, the correct answer is DNA profiling.
Answer:
DNA fingerprinting
Explanation:
g how is atp produced in mammalian cells under aerobic conditions?1. photophosphorylation 2. oxidative phosphorylation 3. substrate-level phosphorylation 4. phosphorolysis i. 2, 3 and 4 ii. 2 and 3 iii. 1 iv. 1 and 2 v.
Atp produced in mammalian cells under aerobic conditions of option 2 and 3 which are oxidative phosphorylation and substrate-level phosphorylation
Electrons from NADH and FADH2 combine with O2 during oxidative phosphorylation, and the energy released from these oxidation/reduction reactions is used to drive the synthesis of ATP from ADP. Substrate-level phosphorylation is a metabolic reaction that produces ATP or GTP by directly transferring a phosphate group from a substrate to ADP or GDP. Transferring energy from a higher energy product (whether or not a phosphate group is attached) to a lower energy product.
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1. Why don’t microorganisms in cultures exhibit constant exponential growth? What are some steps you could take to extend the lifespan of a microbial culture? 2. Using a textbook or a reputable online source, describe how lab cultures are maintained in a continual pattern of growth. Focus particularly on those used in biotechnology, such as E. Coli, which is used to make human insulin. 3. Which of these has a constant growth pattern: an open system or a closed system? 4. A human patient represents what kind of system for bacterial infections? 5. You’re a physician trying to isolate bacterial colonies from the human gut in attempt to diagnose a gastrointestinal infection. You streak your sample on a growth media containing glucose, amino acids, and salts that contain both sulfur and phosphorous with a pH of 7. You incubate the plates in aerobic conditions at 37 ˚C for three days, at which point you can see clear bacterial colonies forming on the plate. Would you feel confident in stating that you had successfully cultured all the bacteria from your gut sample? Why or why not?
4. A human patient represents a host system for bacterial infections, where the human body provides an environment for bacterial growth and proliferation.
Microorganisms, lab cultures, closed system and bacteria colonies1. Microorganisms in cultures do not exhibit constant exponential growth due to limited nutrient availability, accumulation of waste products, and unfavorable environmental conditions. To extend the lifespan of a microbial culture, steps such as providing fresh nutrient media, subculturing, and optimizing growth conditions can be taken.
2. Lab cultures, including those used in biotechnology like E. coli for insulin production, are maintained through aseptic techniques and controlled growth conditions. E. coli cultures are subcultured in fresh media containing necessary nutrients and incubated under monitored conditions to ensure optimal growth.
3. A closed system exhibits a constant growth pattern, where microbial culture is contained without exchange of nutrients or waste products with the external environment.
5. Observing clear bacterial colonies on the growth media plate after incubation does not guarantee successful culture of all bacteria from the gut sample. Some bacteria may have specific nutritional requirements not provided in the medium, and the incubation conditions may not be suitable for all bacteria.
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During protein formation, if an essential amino acid is missing, what can happen to the remaining amino acids?
Answer: If an essential amino acid is not available in the required quantities, protein synthesis will not occur, even if other amino acids are available in the required quantities.
Explanation: During protein synthesis, if one or more amino acids are missing or not present in the required proportions, then the body can't initialize the process of protein production. The remaining amino acids left unsynthesized are degraded, either excreted through urea or converted into fat or carbohydrate.
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Where is the DNA located in a eukaryotic cell?
Answer:
It is located in the nucleus
Explanation:
Answer:
Explanation:
nucleus
The nucleus is particularly important among eukaryotic organelles because it is the location of a cell's DNA.