Question

For there to be homologous structures, a. a common ancestor had to have existed. b. analogous structures also have to exist. c. the bones have to be used similarly. d. All of these are correct.

Name: Problem 8, Chapter 14: Essentials of Biology
Uploaded: 2021-03-22T16:43:46-08:00
Duration: 1 min 53 s
Channel: Courtney Burson
Description: For there to be homologous structures, a. a common ancestor had to have existed. b. analogous structures also have to exist. c. the bones have to be used similarly. d. All of these are correct.

   For there to be homologous structures,
a. a common ancestor had to have existed.
b. analogous structures also have to exist.
c. the bones have to be used similarly.
d. All of these are correct.

Essentials of Biology

Sylvia S. Mader,… 5th Edition

Chapter 14, Problem 8

Instant Answer

Solved by Expert Courtney Burson

03/22/2021

Step 1

Homologous structures are those that are found in a group of animals and include an ancestor as well as the descendant. Show more…

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For there to be homologous structures, a. a common ancestor had to have existed. b. analogous structures also have to exist. c. the bones have to be used similarly. d. All of these are correct.

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Key Concepts

Homologous Structures

These are anatomical features in different organisms that are similar because they were inherited from a common ancestor. They may serve different functions today, but their underlying structural similarities provide critical evidence of evolutionary relationships.

Common Ancestry

The concept of common ancestry is central to understanding evolution. It posits that different species share a common origin, and inherited similar traits—such as homologous structures—from their ancestral lineage, which helps to trace evolutionary paths.

Analogous Structures

Analogous structures are features that perform similar functions in different organisms but did not arise from a common ancestor. They result from convergent evolution, where similar environmental pressures lead to the development of similar traits in unrelated groups.

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