Evolution

Question 1

Define evolution:

Answer 1

• cumulative change in a population or species overtime.

Question 2

Define Natural selection:

Answer 2

• a mechanism that can lead to evolution.
• Phenotypic differences among a population cause some people to survive and reproduce more effectively.

Question 3

What cause adaptions to occur?

Answer 3

• environmental changes
• individuals carry advantageous genetic variation
• species survive long enough to adapt
• trait or DNA variant needs to be passed down from parent to offspring.

Question 4

What is macro evolution?

Answer 4

• major evolutionary changes among large taxonomic groups over long periods of time.

Question 5

Define the term species:

Answer 5

• Species = produced rapidly if conditions are right.
• groups of interbreeding natural populations that are reproductively isolated.

Question 6

Define the term micro-evolution:

Answer 6

• involves changes in sequencing of alleles within a species or small group of organisms
• agents of change shape the genome of a population

Question 7

What are the agents of the change?

Answer 7

• natural selection
• mutation
• sexual reproduction
• genetic drift
• gene flow

Question 8

Define the term population:

Answer 8

• group of organisms interacting with each other and sharing information.