5 Evolution Factors Quiz

What is the primary effect of genetic drift in a small population?

• It causes rapid adaptation to new environments.

• It increases the mutation rate in the population.

• It can lead to reductions in allele frequencies because of a random event.

• It promotes gene flow between adjacent populations.

Tags

DOK Level 2: Skill/Concept

Gene flow can best be described as which of the following?

• The movement of individuals and their genetic material from one population to another.

• The random mutations that occur within a population.

• The survival of the fittest individuals in a population.

• The isolation of a population leading to speciation.

Tags

DOK Level 2: Skill/Concept

Which statement best describes a mutation?

• A random change in the DNA sequence that may affect an organism's traits.

• A planned change in DNA to adapt to environmental changes.

• The movement of genes from one population to another.

• The overall increase in a population's fitness.

Tags

DOK Level 2: Skill/Concept

How does adaptation primarily occur in a population?

• Through random gene mutations that are not influenced by the environment.

• By individuals choosing traits they want to pass to their offspring.

• Through natural selection favoring traits that enhance survival and reproduction.

• By all individuals in a population suddenly acquiring beneficial traits.

Tags

DOK Level 2: Skill/Concept

Which scenario best illustrates gene flow?

• A bear population splitting into two due to a mountain range.

• Bears from one forest migrating to another and breeding with the local population.

• A sudden mutation causing some bears to grow larger claws.

• All bears in a region developing thicker fur over several generations.

Tags

DOK Level 2: Skill/Concept

What typically triggers genetic drift in a population?

• The deliberate selection of advantageous traits by the population.

• A large population suddenly increasing its genetic variation.

• Random changes (like bottleneck effect) in allele frequencies, especially in small populations.

• The introduction of new, beneficial mutations into the gene pool.

Tags

DOK Level 2: Skill/Concept

Which example best demonstrates natural selection?

• A population of fish develops a darker coloration over time to better hide from predators in murky water.

• A group of birds randomly develops a new beak shape which DOES NOT help them adapt to their environment.

• A population of insects migrates to a new area with different climatic conditions.

• A mutation causes a plant to produce deformed seeds that don't sprout.

Tags

DOK Level 2: Skill/Concept