Unit 8.4 - Beyond Natural Selection: Mechanisms of Evolution

Identify the population(s) with the lowest genetic diversity.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

Identify the population(s) most likely to survive a natural disaster.

Tags

NGSS.HS-LS2-8

NGSS.HS-LS4-4

NGSS.HS-LS4-5

Populations with​ (a)   genetic diversity can survive changes to the environment ​ (b)   populations with ​ (c)   genetic diversity.

• high
• better than
• low

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-4

Select the 2 examples of populations that are affected by low genetic diversity.

• 
• 
• 
• 

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

The founder effect happens when a small group of individuals starts a new population in a different location. As a result, genetic diversity is usually ​ (a)   .

• lowered
• increased
• unchanged

Match the following types of isolation that can lead to speciation:

• Behavioral isolation

• Populations are physically separated by barriers like mountains or rivers, preventing them from interbreeding.

• Temporal isolation

• Populations reproduce at different times (seasons, day/night, or years).

• Geographic isolation

• Differences in mating rituals or courtship prevent interbreeding.

Match the following terms:

• Speciation

• The variety of life, including all species, their genes, and their environments

• Biodiversity

• Populations become separated and stop interbreeding

• Gene flow

• The movement of genes between populations

• Reproductive isolation

• Groups of organisms become so different they can no longer breed to produce fertile offspring

• Mutation

• Random changes in a DNA sequence that create a new version of a gene, called an allele

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-5

Which best describes the result of the bottleneck event shown in this graph:

• The population size of cheetahs declined rapidly, avoided extinction, and gradually recovered.

• The population size of cheetahs declined rapidly and eventually went extinct.

• The population size of cheetahs increased dramatically over time.

• Cheetah populations were not affected by environmental changes.

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

NGSS.HS-LS4-5

How does the bottleneck effect impact genetic diversity?

• It increases genetic diversity by introducing new alleles

• It decreases genetic diversity due to a reduction in population size

• It has no impact on genetic diversity

• It increases genetic diversity by promoting gene flow

Tags

DOK Level 2: Skill/Concept

What does the image represent?

• Gene flow
• Gene drift
• Mutation
• Adaptation

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-5