Evidence for evolution

Question 1

List evidences (7)

Answer 1

Hierarchy, homology, ontogeny, vestigial structures, convergence, geographical distributions, intermediate forms.

Question 2

1. Hierarchial organisation of life

Answer 2

species develop over time, from simple to complex

closely related organisms fall into one group as opposed to organisms that evolved independently over time.

Question 3

2. Homology

Answer 3

Basic structure can be similar with different functions- modification in function from an existing structure with time, evidence of common ancestry

Question 4

3.Ontogeny

Answer 4

Structures lost in adults which existed in the ancestral spp are retained in the embryos of recent ancestor

Question 5

4. Vestigial Structures

Answer 5

Retain structures that are no longer functional, but were in the ancestral condition

Question 6

5. Convergence

Answer 6

Unrelated organisms retain structures that are similar in function but very different in structure. Selective pressure can have similar result in diff spp

Question 7

6. Geographical Distributions

Answer 7

Animals of same type in the same area (marsupials)

Question 8

Intermediate forms

Answer 8

Pelvic girdles and legs retained in primitive snake spp and get gradually smaller in more advanced snakes.