Explain how homologous structures are evidence of a common ancestor.

some animals exhibit similar structures.

hope this helps!

-Payshence xoxo

For number 1 is cyanobacteria

For number two is D

For number 5 I think is the striking similarities at early development stages is evidence that they came from a common ancestor.

I hope this helps.

Answer is the one above

They each have vestigial structures.

Explanation:

Birds and humans have a common ancestor as they have homologous structures.

Vestigial structures are the organs that have some important functions in the past but now in present, they do not perform any function.

Both humans and birds have vestigial structures such as humans have an appendix and ear pinna and wings of flightless birds such as ostrich.

Hence, the correct answer is "They each have vestigial structures.".

They both have tails as embryos.

Explanation: Your Welcome ;)

The correct option is B) The homologous structures are evidence of descent with modification from a common ancestor.

Explanation:

Homologous structures can be defined as similarities between organs or skeletal of organisms which suggest that they might have a common ancestor in the past. Homologous structures will have alike structures although they may be present in animals of different texa.

For example, The front legs of a frog, which is an amphibian is similar to alligator which is a reptile. This common structure show that they have homologous structures and hence might have had a common ancestor in the past.  

IDK

Explanation:

A) Some animals exhibit similar structures, possibly due to a common ancestor

Step-by-step explanation:

When two or more organisms have the same type of physical features in them, it shows that the organisms might have evolved from a common ancestor. Such structures are known as homologous structures.

For example, the forelimbs of humans, birds, whales and dogs have the same kind of structural anatomy.  Although, their functions might be different but their structures are similar. This similarity depicts that the organisms might have a common ancestor in the past.

When two or more organisms have the same type of physical features in them, it shows that the organisms might have evolved from a common ancestor. Such structures are known as homologous structures.

For example, the forelimbs of humans, birds, whales and dogs have the same kind of structural anatomy.  Although, their functions might be different but their structures are similar. This similarity depicts that the organisms might have a common ancestor in the past.