What are homologous structures?

2 answers:

8 0

In biology, homology is the existence of shared ancestry between a pair of structures, or genes, in different taxa. A common example of homologous structures is the forelimbs of vertebrates, where the wings of bats, the arms of primates, the front flippers of whales and the forelegs of dogs and horses are all derived from the same ancestral tetrapod structure.

Vladimir [108]3 years ago

6 0

Answer:

An organ or bone that appears in different animals.

Explanation:

A homologous structure is an example of an organ or bone that appears in different animals, underlining anatomical commonalities demonstrating descent from a common ancestor. In other words, it's when very different animals have bones that appear very similar in form or function and seem to be related.

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9. Which is the pathway of oxygen from lungs into the body tissues?

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Answer:

The pathway of oxygen from lungs to the body tissues is alveoli → red blood cells → blood vessels → tissues (option b).

Explanation:

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O₂ from the air reaches the lungs.
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<em> The other options do not show the correct order in which the oxygen travels from the alveoli to the tissues.</em>

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