Which is the best definition of a phylogenetic tree?

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Answer 1
Answer: A phylogenetic tree or evolutionary tree is a branching diagram or "tree" showing the inferred evolutionary relationships among various biological species or other entities—their phylogeny—based upon similarities and differences in their physical or genetic characteristics.
Answer 2
Answer: it is a diagram presenting the affinities of  taxons

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Testing a hypothesis is called a(n) _____. control scientific law experiment variable

Answers

Answer:

It is called a variable

Explanation:

Which two body system were most actively involved in this experiment

Answers

if you could give me a little more information about this experiment i could help you...

Maria is concerned because she has been exposed to a small amount of radiation during an X-ray. What is her doctor most likely to tell her?

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The doctor should reassure the patient that exposure to radiation from a medical device becomes dangerous only if it is exposed for a long time, in high doses, or repeatedly.

It is true that there is a particular risk for pregnant women with regard to the fetus. In this case, the ratio between the benefit to the patient and the possible risk of side effects should always be taken into account.

Many people have been exposed to radiation- and that she shouldnt be worried because the amount of radiation she was exposed to was very little and most likely wont effect anything or anyone.

What is a difference between starch and glycogen?

Answers

Answer:

Glycogen is produced by animals while starch is produced by green plants

Explanation:

Following are the differences between starch and glycogen-

1. The structure of starch is larger as compared to that of glycogen. Glycogens has one molecule while starch has two molecules of glucose

2. Glycogen is produced by animals in their liver, muscles, brain, uterus etc. therefore it is also known as animal starch while starch is produced by green plants.  

3. Glycogen has only branched structure while starch has both branched and chain structure.  

Correct, starch is found in plants and glycogen in animals. BUT, glycogen is found in all animal cells, not just muscle cells. Glycogen is present in the highest amounts in both muscle and liver cells, where it appears as large granules

Which would have the GREATEST effect on the rate of photosynthesis in a plant?a. oxygen level
b. light intensity
c. sugar concentration
d. starch concentration

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I would say B. but I'm not %100 sure

In cells, hydrogen peroxide is converted to water and oxygen through the activity of

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The right answer is enzymes (catalase).

Catalase is an enzyme that allows the dismutation of hydrogen peroxide (hydrogen peroxide) in water and oxygen.

The oxygen-oxygen bond of the hydrogen peroxide is cut off by the iron atom of the heme group, creating a molecule of water and a highly oxidizing iron-oxygen bond. This can oxidize a new molecule of hydrogen peroxide, giving oxygen. The enzymatic reaction at play is one of the fastest known.

Within the cell, catalase helps protect the body from the oxidative and harmful action of hydrogen peroxide.

In cells, hydrogen peroxide is converted to water and oxygen through the activity of enzymes.