Question

unit 1 evolution review
data: comparison of features in fossils and modern species
organisms fins lungs limbs neck mobility
fish ■ ✗ ✗ ✗
tiktaalik ■ ■ ■ ■
amphibians ✗ ■ ■ ■
multiple - choice questions:

1. based on the table, how does tiktaalik support the theory of evolution?

a) it is an extinct species with no relation to modern animals
b) it shares characteristics with both fish and amphibians, suggesting a transition between the two
c) it proves that fish evolved directly into birds
d) it is identical to modern amphibians

1. why is tiktaalik an important fossil discovery?

a) it is the oldest fish fossil ever found
b) it provides evidence of how organisms transitioned from water to land
c) it shows that amphibians evolved directly from mammals
d) it disproves natural selection

Explanation:

1. Tikaalik has fins like fish and lungs, limbs, and neck - mobility like amphibians, indicating a transitional form.
2. Tikaalik is important as it provides evidence of the transition of organisms from aquatic to terrestrial life.

Answer:

1. b) It shares characteristics with both fish and amphibians, suggesting a transition between the two
2. b) It provides evidence of how organisms transitioned from water to land