12.1 SG

Question 1

What is natural selection?

Answer 1

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

Question 2

True or False: Genetic drift can lead to a change in allele frequencies in a population.

Answer 2

True

Question 3

Fill in the blank: Variation in a population is essential for _______.

Answer 3

evolution

Question 4

What are the main components of natural selection?

Answer 4

Variation, competition, survival of the fittest, and reproduction.

Question 5

Multiple Choice: Which of the following is NOT a mechanism of evolution? A) Natural Selection B) Genetic Drift C) Mutation D) Homeostasis

Answer 5

D) Homeostasis

Question 6

What is genetic drift?

Answer 6

Genetic drift is a change in the frequency of an existing gene variant (allele) in a population due to random sampling of organisms.

Question 7

True or False: Genetic drift has a more significant effect in large populations than in small populations.

Answer 7

False

Question 8

What role does variation play in natural selection?

Answer 8

Variation provides the raw material for natural selection, allowing for some individuals to have advantageous traits.

Question 9

Fill in the blank: The founder effect is a type of _______ that occurs when a small group establishes a new population.

Answer 9

genetic drift

Question 10

Multiple Choice: Which of the following can lead to increased variation within a population? A) Mutation B) Genetic Drift C) Natural Selection D) All of the above

Answer 10

A) Mutation

Question 11

What does the term ‘survival of the fittest’ mean?

Answer 11

It refers to the concept that individuals with advantageous traits are more likely to survive and reproduce.

Question 12

True or False: Natural selection can act on both phenotypes and genotypes.

Answer 12

True

Question 13

What is the effect of genetic drift on allele frequencies in small populations?

Answer 13

Genetic drift can cause allele frequencies to change dramatically, potentially leading to the loss of genetic diversity.

Question 14

Fill in the blank: _______ is the process that can lead to the adaptation of a species to its environment over time.

Answer 14

Natural selection

Question 15

Multiple Choice: Which factor can lead to genetic variation? A) Sexual reproduction B) Cloning C) Asexual reproduction D) All of the above

Answer 15

A) Sexual reproduction