Question

processes?
a) mutations are purposeful adaptations
b) mutations are random, while natural selection filters genetic variations
c) natural selection creates mutations
d) mutations and selection are unrelated processes

1. the incompleteness of the fossil record suggests:

a) evolution is impossible to study
b) fossil evidence is unreliable
c) fragmentary evidence can still support evolutionary principles
d) we know nothing about prehistoric life
34 transitional fossils like archaeopteryx are significant because they:
a) prove evolution is a myth
b) illustrate gradual morphological transformations

Explanation:

1. For the first question about mutations and natural - selection: Mutations occur randomly in DNA. Natural selection acts on the resulting genetic variations, favoring those that are beneficial for survival and reproduction.
2. For the second question about the incompleteness of the fossil record: Although the fossil record is incomplete, the existing fragmentary evidence can still provide support for evolutionary principles.
3. For the third question about transitional fossils: Transitional fossils like Archaeopteryx show features of both ancestral and descendant groups, indicating gradual morphological transformations during evolution.

Answer:

1. B. Mutations are random, while natural selection filters genetic variations
2. C. Fragmentary evidence can still support evolutionary principles
3. B. Illustrate gradual morphological transformations