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rodikova [14]
3 years ago
8

On a phylogenetic tree, what do the branch lengths represent?

Biology
1 answer:
elena-s [515]3 years ago
7 0

Answer:

the evolutionary time between two nodes

Explanation:

Branch lengths indicate genetic change i.e. the longer the branch, the more genetic change (or divergence) has occurred

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Assume that life on Earth began 3.5 billion years ago. To the nearest percent, how much of this time have anthropoids been livin
Crazy boy [7]

Answer:

Anthropoids lived for approximately 0.86% of the total time.

Explanation:

  • Anthropoids are the higher developed organisms that includes apes and ape mans.
  • The age of earth is 3500 million and anthropoids lived for about 30 million years.
  • By the simple calculations we can find out the data in percent which gives us the result nearest to 0.86%.
  • That means 0.86% of 3.5 billion year is equivalent to 30 million years (time that was lived by anthropoids).
4 0
3 years ago
What organism meets the criteria for group b? question 3 options: hammerhead shark emperor penguin rattle snake box turtle
pickupchik [31]

The Emperor penguin is an organism that meets the criteria for group b.

<h3>Are penguins Endotherm or Ectotherm?</h3>

Endotherms: Penguins, and prairie dogs, like most other birds and mammals, are endotherms. Iguanas and rattlesnakes, like most other reptiles along with most fishes, amphibians, and invertebrates are ectotherms.

Endotherms generate most of the heat they need internally.

Thus, the emperor penguin is an organism that meets the criteria for group b.

To learn more about penguins click here:

brainly.com/question/311514

5 0
2 years ago
Read 2 more answers
Each nucleotide in DNA and RNA has an aromatic base. What is the principal force that keeps the bases in a nucleic polymer from
yawa3891 [41]

Answer:The helix structure Of DNA helps prevent it from been expose and also the sugar and phoshate group that are important components of nucleotides forms a backbone on the helix structure or the polynucleotide this back bone is hydrophobic i.e water loving hence wouldn't allow for penetration for water.

2. Hydrogen bond is formed between this bases to keep them in place.

Explanation:

7 0
3 years ago
PLZ PLZ PLZ I NEED THIS OR I AM GOING TO FAIL PLZ....Give an example of two other body systems that work together and explain ho
svetoff [14.1K]

Answer:

Circulatory and excretory

Explanation:

Excretory removes waste products and toxins from the blood using the kidneys. The kidneys filter the blood and return the essential products (water, salt, sugar, etc) back to the bloodstream in normal amounts after removing the wastes. The circulatory system provides the kidneys with oxygen, allowing the organ to live and to do its job.

6 0
3 years ago
A person with type A blood has _______ antibodies circulating through his or her plasma and produces ________ antigens on the ce
Sedbober [7]

Answer:

What is d. anti-B; A

Explanation:

A person with type A blood has Anti-B antibodies circulating through his or her plasma and produces A antigens on the cell surface.

If this helps you please let me know with rating, thank you or brainly!

Thanks,

Miss Hawaii

4 0
2 years ago
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