Biology Unit 6 Quiz Part 2

If a population of animals is experiencing a shift towards one extreme trait, what type of natural selection is likely occurring?

Stabilizing selection favors individuals with extreme traits.

What is the primary method used to determine the precise age of a fossil?

The adaptation that allows an organism to resemble another organism or object is called ______.

Match the following types of natural selection with their descriptions:

Structures that have the same function but different underlying structures are called:

The presence of pelvic and femur bones in whales, despite the absence of legs, is an example of a homologous structure.

According to the cladogram, which organism is the most closely related to the chimpanzee?

The process by which organisms with traits better suited to their environment are more likely to survive and reproduce is called ______________.

What percentage of Element X remains after 15 million years?

Match the following terms with their correct definitions:

Based on the fossil picture, which fossil is the youngest?

Camouflage and mimicry are examples of natural selection.

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.

This quiz covers key concepts of biological structures and evolutionary evidence found in Unit 6. Topics include analogous and vestigial structures, cladograms, and the analysis of fossil records. Test your understanding of these important concepts in evolution and biology.