Question

1) Darwin's four postulates include (circle all that apply) 

 a) Reproductive success and survival are NOT predictable b) There is variation in a population c) Some trait differences in a population are heritable and are passed from generation to generation d) Individuals with certain traits are more likely to survive and reproduce e) All of the above are Darwin's postulates. 

2) For each of the following, indicate whether the statement is True or False (circle correct choice) 

a) An adaptation is a behavior that increases fitness of an individual. b) Fitness is the ability of an organism to survive and reproduce. c) One particular trait is always more advantageous than another. d) Genetic diversity leads to biological diversity.

3) Westeros is an island with extreme differences in climate; the North is cold and winter-like, and the South has a warm, sunny and mild climate. The following questions consider bird populations on the island.

 Crows inhabit the North. They are scavengers that can eat grains, seeds, fruits, animals or dead and decaying organisms. 

Thousands of years ago, a small population of crows in the far North of the island was isolated when a glacier-formed between their location and the rest of the island. Over time, the characteristics of this population diverged to have larger beaks (better to hunt with) and thick down under their feathers for warmth. It eventually became a new species of crow. 

This is an example of: sympatric/allopatric (circle) speciation.

This new species population was not in Hardy-Weinberg equilibrium because (circle all that apply): 

a) There was gene flow b) There were forces of natural selection c) There was genetic drift d) There was new mutation e) All of the above. 

Answer 1

1. Darwins law states that:

• Individuals in a population differs greatly in their traits.
• Fit individuals are able to make offsprings.
• Unfit individuals do not survive.
• Traits are inherited from parents to offsprings

3. Allopatric speciation occurs when individuals in a population gets separated from other such individuals due to some geographical barrier and in this case glaciers.

Hardy-weinberg equilibrium states that, allel frequencies will remain constant in a population into next generation and subsequent generation in the absence of evolutionary forces like genetic drift, mutation, gene flow etc.

Evolution (18 pts) 1) Darwin's four postulates include (circle all that apply) (2 pts) a) Reproductive success and survival are NOT predictable There is variation in a population Some trait differences in a population are heritable and are passed from generation to generation b) c) d) Individuals with certain traits are more likely to survive and reproduce of the above are Darwin's postulates. 2) For each of the following, indicate whether the statement is True or False (circle correct choice) (2 pts) a) An adaptation is a behavior that increases fitness of an individual. b) Fitness is the ability of an organism to survive and reproduce. c) One particular trait is always more advantageous than another d) Genetic diversity leads to biological diversity 3) Westeros is an island with extreme differences in climate; the North is cold and winter-like, and the South has a warm, sunny and mild climate. The following questions consider bird populations on the island. Crows inhabit the North. They are scavengers that can eat grains, seeds, fruits, animals or dead and decaying organisms. . Thousands of years ago, a small population of crows in the far North of the island was isolated when a glacier formed between their location and the rest of the island. Over time, the characteristics of this population diverged to have larger beaks (better to hunt with) and thick down under their feathers for warmth. It eventually became a new species of crow. This is an example of: sympatric /allopatric (circle) speciation. (1 pt) This new species population was not in Hardy-Weinberg equilibrium because (circle all that apply): (3 pts) a) There was gene flow b) There were forces of natural selection c) There was genetic drift d) There was new mutation e) All of the above 10