Biology Unit 6 Quiz Part 2

Biology Unit 6 Quiz Part 2

• Question 1: Bat and bird wings, despite similar functions, differ in structure. Bat and bird wings contain bones, while a flying squirrel's "wing" is a skin flap. Butterfly wings lack bones. These examples are considered analogous structures.

• Question 2: Whale pelvic and femur bones, despite not being used for locomotion, are remnants. This is evidence of evolution and shows a vestigial structure.

• Question 3: Hagfish is the ancestral organism in the provided cladogram.

• Question 4: The organism possessing only jaws, lungs, and claws is the perch.

Analysis of Graphs

• Question 5: After 10 million years, approximately 25% of Element X remains.

• Question 6: If a fossil has 37% of element X remaining, approximately 13 million years have passed.

• Question 7: Fossil B is older than fossil D; Fossil D is younger than Fossil B. Fossil C is older than Fossil B, but younger than fossil E.

• Question 8: Darwin believed species change over time through natural selection.

Additional Concepts

• Question 9: Natural selection favors organisms best adapted to their environment, resulting in successful survival and reproduction.

• Question 10: The provided image illustrates disruptive selection.

• Question 11: In horses, the largest size exhibits the highest population, implying directional selection.

• Question 12: The graph illustrates disruptive selection.

• Question 13: Radiometric dating is the most accurate method for determining the exact age of a fossil.

• Question 14: Camouflage enables an organism to blend into its surroundings for protection.

• Question 15: Genetic drift, unlike natural selection, is random (no rhyme or reason), while natural selection favours advantageous traits for survival.