Phloem sap can flow A. from leaves to shoots only B. from shoots to leaves only C. from sites of sugar production to storage units only D. both ways between production and storage sites
Answers
Between production and storage locations, phloem sap can flow in both directions.
Phloem sap: what is it?Phloem sap, which is mostly dissolved in water, is made up of minerals, hormones, and carbohydrates. It moves from where carbohydrates are produced or stored (the sugar supply) to where they are consumed (sugar sinks).
The pressure flow idea suggests a mechanism for phloem sap transport notwithstanding the availability of competing theories. It is believed that phloem sap from vascular plants facilitates the transmission of informational impulses.
Phloem sap is consumed as the only or main source of food by a relatively small range of animals. It is "nutrient-rich relative to many other plant products and typically low in toxins and feeding deterrents."
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Related Questions
some animals look things from very far distance and others not see from far distance why?
Answers
Answer:
The brain gets better with practice, so routine actions like walking become second nature. That is why your first time on the monkey bars is harder than your 100th time.
So how does the brain judge distance? The key for animals — like monkeys and humans — is in our eyes.
Where these different views overlap is how the brain is able to calculate the difference in distance and to judge depth.
This happens because the closer an item is to you, the greater the relative difference between the eyes will be compared with the object. The farther away an item is, the smaller the relative distance between the eyes will be. Our brain is great at remembering patterns, and it remembers the differences that each eye is seeing and correlates it with a distance. It can also find the distance by calculating the “convergence,” or how crossed your eyes become while looking at something. The more crossed your eyes become when looking at an object, the closer the object.
Alice was participating in a photosynthesis lab for science class. The lab procedures instructed Alice to prepare a test tube containing water, a sprig of elodea (a common aquarium plant), and 10 g of sodium bicarbonate (NaHCO3). She was then instructed to place the test tube in front of a strong light source for one minute. Alice noticed tiny bubbles forming on the leaves of the elodea. What is the most logical explanation for why Alice saw bubbles forming on the leaves of the elodea?Group of answer choicesThe bubbles formed as a result of the hydrogen from the sodium bicarbonate mixture dissolving the elodea leaves.The bubbles formed from the release of water molecules from the elodea leaves.The bubbles formed as the elodea plant released oxygen from the elodea leaves.The bubbles formed as the elodea plant released carbon dioxide from the elodea leaves.
Answers
Step 1.
Write down the experiment data.
- tube containing water;
- alodea (photosynthetic organism);
- 10 g of sodium bicarbonate;
- light source.
Step 2.
Why bubbles are formed on the leaves of the alodea?
The experiment have all the condictions for photosynthesis, since it provides: water (that is in the tube), CO2 (because of the dissolved sodium bicarbonate), light (because of the string light source). Therefore the most ogical explanation for Alice experiment results is: the bubbles formed as the elodea plant releases oxygen from the elodea leaves, that because with all the elements in the experiment the plant can do a normal photosynthetic process that way realing oxygen in the tube and forming bubbles of "air".
In what way do the particular proteins in our bodies depend on our DNA.
Answers
Answer:
Proteins are synthesized in the body through a process called Translation. Translation occurs in the cytoplasm and involves converting genetic codes into proteins. Genetic Codes are assembled during DNA transcription, where DNA is decoded into RNA. The cell structures called Ribosomes. Ribosomes help transcribe RNA into polypeptide-chains that need to be modified to become functioning proteins.
You will NOT find a cell wall in which of these kind of organisms?
Answers
Answer:
Algae and fungi do not have cell wall and many other organisms do not have a cell wall.You can check it out on google for more examples.
Explanation:
You want to study the relationship between daily alcohol consumption and prostate-specific antigen levels. It was suggested that these two parameters have a linear relationship and as you increase your alcohol consumption your prostate-specific antigen level increases. What kind of a linear model would represent this relationship?
Answers
The kind of linear model that would represent this relationship is a positive linear model.
In a positive linear model, as the independent variable (alcohol consumption) increases, the dependent variable (prostate-specific antigen levels) also increases in a linear fashion. This implies that there is a positive correlation between the two variables, suggesting that higher alcohol consumption is associated with higher levels of prostate-specific antigen.
A linear model represents a straight-line relationship between the variables, and in this case, it would show a positive slope. The slope of the line indicates the rate at which the prostate-specific antigen levels increase with each unit increase in alcohol consumption.
By studying this relationship, researchers can gain insights into the impact of alcohol consumption on prostate-specific antigen levels and potentially understand the association between alcohol and prostate health.
However, it is important to note that further research and analysis are necessary to establish a causal relationship and consider other factors that may influence prostate-specific antigen levels.
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Question 8 (1 point)
Astrid has been studying the genetic material of the dragons to get more insight into why there are so many different
breeds. What macromolecule would she be studying?
carbohydrates
proteins
lipids
nucleic acids
с
d
Answers
Answer:
nucleic acids
Explanation:
The macromolecule Astrid would be studying is the nucleic acids. They contain the genetic materials that would provide useful information for her study.
Nucleic materials are very essential to all life forms. In the broad sense, nuclei materials is the general term for DNA and RNA. These materials contains genetic information that can help Astrid's study. The materials are passed from parents to offspring in the genetic tree.which of the following investigations would enable researchers to test the claim that an increased concentration of algae has a negative effect on the number of aquatic invertebrates in the ecosystem?
Answers
To test the claim that an increased concentration of algae has a negative effect on the number of aquatic invertebrates in an ecosystem, researchers can conduct the following investigations:
Correlation study: Researchers can collect data on algae concentration and the abundance of aquatic invertebrates across different locations within the ecosystem.
By analyzing the data, they can determine if there is a consistent negative correlation between algae concentration and the number of invertebrates.
Manipulative experiment: Researchers can establish controlled mesocosms or enclosures where they can manipulate the concentration of algae.
They can create treatments with varying levels of algae and monitor the response of aquatic invertebrates over time.
This will help determine if an increased concentration of algae directly affects the abundance and diversity of invertebrates.
Observational study: Researchers can conduct long-term observations in ecosystems with varying levels of algae concentration.
They can document changes in the population dynamics, behavior, and species composition of aquatic invertebrates in relation to changes in algae concentration.
These investigations will provide empirical evidence to assess the impact of increased algae concentration on the number of aquatic invertebrates, helping to validate or refute the claim.
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Propose that all three carbon atoms in glycerol is labeled with 14C. The labeled glycerol is allowed to undergo metabolism in the genetically modified liver cell, in which the triose phosphate isomerase is no longer functioning. Which of the following are most likely to be true?
a. All three carbon atoms in pyruvate are radioisotope labeled in the genetically modified liver cell b. All six carbon atoms in glucose are radioisotope labeled in the genetically modified liver cell c. Both a and b d. Neither nor b
Answers
It can be explained that triose phosphate isomerase deficiency or a loss of the enzyme activity of triose phosphate isomerase may result in a biochemical disorder called Triose phosphate isomerase deficiency. The correct answer is a. All three carbon atoms in pyruvate are radioisotope labeled in the genetically modified liver cell.
During glycolysis, triose phosphate isomerase is a crucial enzyme that catalyzes the conversion of dihydroxyacetone phosphate (DHAP) to glyceraldehyde-3-phosphate (G3P).
a. All three carbon atoms in pyruvate are radioisotope labeled in the genetically modified liver cell.
b. All six carbon atoms in glucose are radioisotope labeled in the genetically modified liver cell.
c. Both a and b.
d. Neither nor b.
The answer is a. All three carbon atoms in pyruvate are radioisotope labeled in the genetically modified liver cell. When all three carbon atoms in glycerol are labeled with radioisotope 14C and the labeled glycerol is metabolized in the genetically modified liver cell, triose phosphate isomerase is inactive.
Therefore, glyceraldehyde-3-phosphate (G3P) is not converted to dihydroxyacetone phosphate (DHAP), and the cell accumulates G3P. This causes the G3P to enter the gluconeogenesis pathway and be transformed into pyruvate.The only carbon atom that is labeled with radioisotope 14C is the number one carbon atom of pyruvate. In the pyruvate molecule, the second and third carbon atoms are derived from carbon dioxide (CO2), which is not derived from glycerol.
Therefore, the correct answer is a. All three carbon atoms in pyruvate are radioisotope labeled in the genetically modified liver cell.
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John's parents would not let him study while listening to CD's in his room. They told
Kim that he could not concentrate with the background noise. He decided to test this
idea with an experiment on his class. Each Friday his English class took a vocabulary
quiz on 25 new words learned that week. John got his teacher's permission to try his
experiment. On the first Friday of his test he played a rock song in the classroom
while the class took the test and the following week the class took the test with the
normal quiet atmosphere of a classroom. John calculated the average score on the two
vocabulary
Answers
Answer:
This question is incomplete; the question is asking to identify the following: independent variable, dependent variable, control group, experimental group, and constants.
The answers are:
Independent variable- BACKGROUND NOISE/MUSIC
Dependent variable- AVERAGE SCORE
Control group- THE CLASS THAT TOOK THE TEST IN A NORMAL QUIET ATMOSPHERE
Experimental group- THE CLASS THAT TOOK THE TEST WHILE PLAYING A ROCK SONG
Constants- SAME VOCABULARY QUIZ, SAME NUMBER OF WORDS, SAME CLASS
Explanation:
Independent variable in an experiment is the variable that is manipulated or changed in an experiment. In this experiment, the independent variable is the MUSIC or BACKGROUND NOISE played during each vocabulary test.
The dependent variable is the variable that is tested or measured in an experiment. It is the variable that responds to changes made to the independent variable. In this experiment, the dependent variable is the AVERAGE SCORE on the vocabulary test.
Control group is the group that does not receive the experimental treatment. It is the group where the independent variable does not change in order to compare with the experimental group. The control group in this experiment is THE CLASS THAT TOOK THE TEST IN A NORMAL QUIET ATMOSPHERE.
Experimental group is the group that receives the experimental treatment. The experimental group in this experiment is THE CLASS THAT TOOK THE TEST WHILE PLAYING A ROCK SONG
The constants or control variables are the variables that are kept constant or unchanged throughout the experiment in order not to influence the experiment's result. In this experiment, the constants include; SAME VOCABULARY QUIZ, SAME NUMBER OF WORDS, SAME CLASS
10. Movement of blood through the
tissues of the heart
Answers
Answer: Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
Explanation:
global annual co2 emissions have increased by approximately 30 gt from the year 1800 to today. true or false?
Answers
The statement is true. Global annual CO2 emissions have indeed increased by approximately 30 GT (gigatons) from the year 1800 to today.
The statement is true. Global annual CO2 emissions have indeed increased by approximately 30 GT (gigatons) from the year 1800 to today. This is largely due to the industrial revolution and the subsequent increase in the burning of fossil fuels. CO2 emissions are a major contributor to global warming and climate change, which has led to significant environmental and social impacts. Efforts are being made by countries around the world to reduce CO2 emissions and mitigate the effects of global warming. This includes the adoption of renewable energy sources and the implementation of policies and regulations aimed at reducing greenhouse gas emissions. It is crucial that we continue to address this issue and work towards a more sustainable future for our planet.
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Pseudohypertrophic muscular dystrophy is an inherited disorder that causes gradual deterioration of the muscles. It is seen almost exclusively in boys born to apparently normal parents and usually results in death in the early teens. Is this disorder caused by a dominant or recessive allele? Is its inheritance sex-linked or autosomal? How do you know? Explain why this disorder is almost never seen in girls.Recessive; if the disorder were dominant, it would affect at least one parent of a child born with the disorder. The disorder's inheritance is sex-linked because it is only seen in boys. For a girl to have the disorder, she would have to inherit recessive alleles from both parents. This would be very rare, since males with the recessive allele on their X chromosome die in their early teens.
Answers
Pseudohypertrophic muscular dystrophy is an inherited Recessive disorder.
If the disorder were dominant, at least one parent of a child who was born with the disorder would be affected. As it only affects boys, the disorder is inherited in a sex-linked manner. It would take recessive alleles from both parents for a girl to inherit the disorder. Given that males with the recessive allele on their X chromosome usually pass away in their early teens, this would be extremely uncommon.
Define Pseudohypertrophic muscular dystrophy .
Gowers first highlighted the familial nature of PROGRESSIVE muscular dystrophy shortly after it was first identified more than a century ago. The disease, which has comparable symptoms in affected family members, might differ in its route of inheritance and clinical features from kindred to kindred. The most prevalent variant, first identified by Duchenne in 1868, is passed on as an X-linked recessive trait. These affected males typically begin to have muscle weakness in their pelvic femoral muscles before the age of six, experience rapid progression of their muscle weakness, develop pseudohypertrophy of the calves, become chair-bound by the age of twelve, and pass away by the age of twenty.
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carbon is added to rubp in what step of photosynthesis
Answers
RuBisCO catalyzes a reaction between CO2 and RuBP, which forms a six-carbon compound that is immediately converted into two three-carbon compounds. This process is called carbon fixation, because CO2 is “fixed” from its inorganic form into organic molecules.
5. What is the top quality you were looking for in assessing a material intended to hold a molten metal?
Answers
Answer:
Low thermal conductivity
Explanation:
The top quality you were looking for in assessing a material intended to hold a molten metal is low heat and thermal conductivity.
What are the properties of a metal?The properties of metal include malleability, ductility, sonorous, good conductor of heat and electricity, etc.
If you want to hold a molten metal, you should have a material that possesses a low thermal conductivity.
Therefore, the top quality you were looking for in assessing a material intended to hold a molten metal is low heat and thermal conductivity.
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Onepage review on why understanding gas and vapors in a work setting is important and what we can do in our workplace to prevent accidents with gases and vapors.
Answers
Understanding gas and vapours in a work setting is incredibly important for workplace safety. Gas and vapours can contain noxious substances that, if exposed to, can lead to serious injury or health implications.
In order to prevent such accidents, employers must perform risk assessments in order to assess and identify any areas of risk and put in place control measures to limit them. If gas and vapours are used onsite, then suitable ventilation and extraction systems should be in place.
Employers should also ensure that their staff are aware of the potential risks associated with such substances and provide adequate training and instruction in how to work safely. Finally, employers should also check that any necessary personal protective equipment is provided and communications are in place to be able to notify relevant emergancy responders in case of an accident.
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During which phase of mitosis do the chromatids line up in the center of the cell?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Answers
Answer:
B) Metaphase
Explanation:
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What term best classifies cell A?
Choose 1 answer:
(Choice A)
A
Plant cell
(Choice B)
B
Bacterial cell
(Choice C)
C
Animal cell
(Choice D)
D
Fungal cell
Answers
The cell A is plant cell.
What is cell?A cell is the structural and functional unit of life.All living things are composed of cells.A single-celled organisms are called unicellular organisms whereas organisms having two or more number of cell is called multicellular organisms.A cell has various specialized structure called organelles that performs specific function for the cell.What is plant cell?"A plant cell is a eukaryotic cell that contains a true nucleus and certain organelles to perform specific functions."Plant cell has cell wall, chloroplast and vacuole which is not present in other cell.Cell wall provides structural support and protection to the plant cell.Chloroplast contains pigment chlorophyll which helps them to make their own food.Vacuoles present in the cell store water and nutrients.Hence, the correct option is: A. Plant cell.
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The value that stays the same as long as there are no signals in the neuron is known as:________
Answers
The value that stays the same as long as there are no signals in the neuron is known as resting potential.
What are neurons?Neurons are special cells whose function is to receive and relay information from the external environment and to the brain and back.
Neurons are the main cells of the brain.
The membrane of the neuron has differences of negative charges across them. This is known as a potential difference.
Neurons conduct information when their is action potential.
In conclusion, the presence of action potential results in the transmission of information.
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_ If the cheetah population decreases, what would happen to the gazelle populations
Answer) increase
Answers
Answer:gazelle populations would increase if the cheetah popu;ations increasedExplanation:
Write in phrases or sentences the similarities and differences between DOGS and CATS.
13. COMPARE (SIMILARITIES)
1.
2.
3.
4.
5.
CONTRAST (DIFFERENCES)
1.
2.
3.
4
5.
Answers
Answer:
COMPARE (SIMILARITIES):
1. Both dogs and cats are popular domesticated pets.
2. They are mammals and have fur or hair.
3. Both are known for their ability to provide companionship to their owners.
4. They require similar basic needs such as food, water, and shelter.
5. Both can be trained to perform certain tasks or behaviors.
CONTRAST (DIFFERENCES):
1. Dogs are typically more social and interactive with their owners and other dogs, while cats are often more independent.
2. Cats are known for their grooming habits, while dogs require more bathing and grooming from their owners.
3. Dogs are often larger in size and require more space and exercise than cats.
4. Cats are typically more agile and better climbers than dogs.
5. Dogs are known for their loyalty and ability to protect their owners, while cats are known for their ability to hunt pests such as mice.
Explanation:
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Which microfossils are useful for paleotemperature determination
using the oxygen isotope ratios of their shells?
Answers
The microfossils that are useful for paleotemperature determination using the oxygen isotope ratios of their shells are foraminifera.
Foraminifera are tiny marine animals that have been living for millions of years. Their shells are made up of calcium carbonate and are well-preserved in sediments. The shells of these microorganisms are widely used in paleoceanography to determine past climatic conditions. Paleoceanography is the study of the history of the oceans in the geological past using sediments and fossils. It helps us to understand how the oceans and climate have changed over time.
Paleotemperature is the measure of the temperature that existed in past geological ages. The temperature is determined by various means, including studying the growth rings of trees, ice cores, and microfossils, and others. Microfossils are microscopic fossils that are found in rocks and sediments that help in reconstructing past environmental and climatic conditions.
Oxygen isotope ratio is the measure of the relative abundance of oxygen isotopes 18O and 16O in a sample. The ratio of the two isotopes changes as a result of temperature changes. The ratio is used to reconstruct past temperature changes.
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Which of the following DOES NOT OCCUR
in Prophase (which includes
prometaphase)?
the nuclear membrane starts to break
down and desintegrates
chromosomes line up at the equator of the
cell
the chromatin condenses into
chromosomes
the centrioles form spindle fibers
spindle fibers attach to the kinetochore of
the chromosomes
Answers
Answer:
Chromosomes line up at thr equator of the cell.
Explanation:
Chromosomes line up at thr equator of the cell occurs in metaphase. So, it aint occur in prophase
Which of the following is NOT one of the zones in a lake?
a. littoral zone
C. open-water zone
b. surface zone
d. deep-water zone
Answers
2. Define biomagnfication.
Answers
Answer:
It is the gradual accumulation of substances
During which phase of meiosis is the chromosome number reduced?
Answers
Answer: Meiosis I
Explanation:In meiosis I there is a reduction of the chromosome number from diploid (two separate copies of each chromosome) to haploid (one copy of each chromosome) during the formation of gametes.
question 1 1. what effect did repeating the exercise over time have on the muscles used?
Answers
Repeating the exercise over time caused the muscles used to become stronger and more efficient at performing the exercise.
When we repeat an exercise over time, our muscles adapt to the movement and become stronger. This is known as the principle of progressive overload.
Our muscles are made up of fibers, and when we exercise, we create tiny tears in these fibers. As our body repairs these tears, our muscles become stronger and more efficient at performing the exercise.
This is why it is important to gradually increase the intensity of our workouts over time, to continue challenging our muscles and promoting growth and strength.
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Hardwired characteristics of the brain that attempt to keep us in balance by correcting deficiencies are referred to as:
Answers
Hardwired characteristics of the brain that attempt to keep us in balance by correcting deficiencies are referred to as homeostatic mechanisms.
Homeostasis is the body's ability to maintain a stable internal environment despite external changes.
In the context of the brain, homeostatic mechanisms involve various processes that regulate physiological functions and maintain optimal levels of essential substances.
These mechanisms can include feedback loops that detect imbalances and initiate corrective actions.
For example, if there is a deficiency in a particular nutrient or hormone, the brain may activate mechanisms to increase its production, decrease its consumption, or enhance its absorption from the environment.
Homeostatic mechanisms play a crucial role in ensuring the body's overall stability and functioning, helping to maintain proper levels of various substances and promoting overall well-being.
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Choose the terms that are NOT paired correctly. crista ampullaris / dynamic equilibrium macula / dynamic equilibrium Organ of Corti (spiral organ) / hearing
Answers
The incorrect pair is Macula/ dynamic equilibrium.
What are the functions of Macula?Macula exists present in inner ear where it contains an membrane and otoconia that bend hair cells in thee direction of gravity. The response to gravitational pulls helps in maintaining the sense of balance of the body.
The macula (like the rest of your retina) translates sunlight that enters your eye into the photos you see. It's responsible for the central vision that lets you see objects straight in front of you. Light passes through the lens at the front of your eye and strikes the retina.
Macula detect the changes in the body with respect to gravity (static equilibrium) in the movement in one direction .
Therefore, the correct will be Macula/ static equilibrium.
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aldosterone . a. functions to increase sodium reabsorption b. production is greatly influenced by acth c. presence increases potassium concentration in the blood d. is secreted by the neurohypophysis
Answers
Aldosterone a. function to increase sodium reabsorption
The endocrine system is a collection of glands and organs that produce and release hormones into the human body. This system functions to control and regulate various activities in the body such as metabolism, reproduction, and growth. The following are several types of endocrine glands, namely thyroid, parathyroid, pituitary, gonads, adrenals, pancreas, and thymus.
Aldosterone is a steroid hormone that plays an important role in maintaining normal sodium and potassium concentrations in the blood. In addition, this hormone also controls blood volume and blood pressure. Aldosterone will increase the amount of salt that is reabsorbed into the bloodstream. So that electrolyte levels and blood pH are maintained.
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which is not a function of epithelial tissue? group of answer choices support body structures protective barrier absorb substances secrete substances
Answers
Epithelial tissue functions as a protective barrier, absorb substances, and secrete substances. It does not function as a support body structures.
It serves many important functions, including supporting body structures, absorbing substances, and secreting substances. Epithelial tissue is responsible for protecting the body from physical, chemical, and biological damage. It also plays a role in regulating the exchange of substances between the body and the external environment. Epithelial tissue can absorb nutrients and other substances from the external environment and transport them to other tissues and organs.
Additionally, it can secrete substances such as hormones, enzymes, and mucus, which are essential for many physiological processes. In summary, all the options listed - support body structures, protective barrier, absorb substances, and secrete substances - are functions of epithelial tissue.
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