how does the manipulation of an independent variable during a scientific experiment allow a scientistto find a cause and effect relationship between the variables

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Answer 1

Answer: The manipulation of an independent variable during a scientific experiment allows a scientist to find a cause and effect relationship between variables.This is because the manipulation changes the results and measurements.

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A new highly nutritious crop is going to be planted in an area where it has never been planted before. Which is the most likely outcome of such an event?

Which one of the following conditions is an example of resource partitioning?

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Resource partitioning is when animals who compete over the same resource have a system of how their resources will be split between them. An example would be if there were two species of squirrels, and one eats those acorns that are still on branches, while another eats only those that have fallen on the ground.

After Frida stops exercising, she continues to breathe heavily. What is most likely occurring in her body?A. Heavy breathing during exercise has produced an oxygen surplus in her muscles. This oxygen is being transported to her lungs. This is a result of aerobic respiration.

B. Heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. Lactate is being transported to her liver. This is a result of aerobic respiration.

C.Strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration.

D. Strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration.

Answers

The correct answer is option D. Strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration.

During exercise, the muscles use the oxygen present there and become deprived of oxygen. Due to less oxygen, the anaerobic respiration occur in the muscles, to overcome this, the heavy breathing takes place. heavy breathing brings the oxygen to the muscles.

During anaerobic respiration, the glucose is broken down into the lactate and the lactate is transferred to the liver for the gluconeogenesis and to maintain the constant supply of the glucose to the muscles.

A simple diagram of Cori cycle (lactic acid cycle) is given below:

Out of the choices given, what is most likely occurring in her body is the strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration. The correct answer is D.

The water cycle is also referred to as the _______ cycle

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Answer:

The correct answer would be hydrologic cycle (hydro means "related to water").

Hydrologic cycle or water cycle refers to the cyclic movement of water in an ecosystem.

The physical processes involved in the cycling of water throughout the ecosystem are: evaporation, condensation, sublimation, precipitation, infiltration, and runoff (surface and sub-surface).

Water evaporates from the surface of the earth into the atmosphere where they condense to form clouds. When temperature decreases, the water droplets merge with each other to form bigger droplets which are precipitated in the form of rain.

Water can also precipitate in the form of snow, fog, hail sleet et cetera.

Water fall on the earth surface either infiltrate to form ground water or runoff the surface to from lakes, rivers et cetera.

water cycle is also called hydrologic cycle

Describe the function of each of the following in protein synthesis: rrna,mrna,trna

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mRNA allows for the transcription of DNA onto a primary transcript which then travels to the ribosome.

rRNA makes up the structure of the ribosome, where translation occurs.

tRNA transports amino acids to the ribosome, and joins them onto the end of the forming polypeptide chain. tRNA has an anticodon which is complimentary to the codon of mRNA it is translating.

mRNA is transcribed from DNA.The nucleotide in mRNA code for amino acids.tRNA translates the mRNA sequence into an amino acid sequence so proteins can be made.

Which of these statements correctly compares probeware (such as an electronic temperature probe) to traditional analog tools (such as a liquid-based thermometer)?

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These tools are used to measure or identify certain degree of occurrence depending on which specific area it is used. Thermometers are used to measure the degree of temperature in a room, area or a certain location. Moreover, probewares use electrons and the activity or heat signature in a room while liquid based uses the heat of an object to indicate how much heat energy is involved.

George is running a 5-km race and his cells need more oxygen. Which change will help his body meet the increased demand for oxygen? A. His heart beating more quickly. B. His pancreas releasing more insulin. C. His breathing becoming more shallow. D. His sweat glands becoming more active.

Answers

Answer: A. His heart beating more quickly.

Explanation:

The physical activity like running increase the rate of heart beat and blood circulation in the body due to muscular activity. During running the body experiences the depletion of oxygen. Oxygen becomes the main requirement for cellular respiration during running. To meet the requirement of oxygen the heart pumps the blood faster so that the requirement in each cell get fulfilled through rapid blood circulation.

On the basis of the above explanation, A. His heart beating more quickly. is the correct option.

A. because the heart will pump more blood filled with oxygen to the muscles that need it most

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