Bio Quiz 1 Concepts

Question 1

What were Darwin’s four postulates?

Answer 1

1. Overproduction - more organisms than needed
2. Variation - difference in genetics that is an advantage
3. Competition - organisms compete for basic life necessities
4. Natural selection - selection of who gets to live and reproduce based on advantageous traits. If able to survive, genetic trait is passed on

Question 2

Darwin’s observations

Answer 2

1. Generations of populations produce more offspring than the parents
2. Populations do not grow
3. Resources are limited - competition
4. individuals vary in a population
5. Variations witnessed are heritable

Question 3

Darwin’s Inferences

Answer 3

1. Individuals in a population constantly compete
2. Individuals will inherit characteristics giving them a better chance of survival

Question 4

Darwin’s Theory

Answer 4

1. Over time, populations will change
2. Change will occur as advantageous traits are more common
3. Adaptation will occur as the allele/gene frequency increases
4. Adaptation can lead to speciation

Question 5

Directional

Answer 5

Favours phenotypes at one extreme

Question 6

Stabilizing

Answer 6

Favours the intermediate phenotype

Question 7

Disruptive

Answer 7

Favours the only two extremes

Question 8

Sexual

Answer 8

Reproductive success based on the ability to attract a mate

Question 9

Types of Adaptations

Answer 9

Structural - Outside the body
Behavioral - How organism acts
Physiological - Inside the body