Asked by nk

Genetic recombination refers to the:
(1 point)
• Shuffling of genetic material between chromosomes.
• Copying of DNA during cell division.
• Inactivation of genes on chromosomes.
• Mutation of individual genes.

Which of the following statements accurately describes the relationship between natural selection and evolution? (1 point)
• Natural selection is a mechanism of evolution, and evolution is the observed change in populations over time.
• Natural selection is a theory, while evolution is a fact.
• Natural selection and evolution are synonyms for the same process.
• Evolution is a gradual process, while natural selection can happen rapidly.

How can natural selection occur within a bacterial population exposed to antibiotics? (1 point)
• All bacteria will develop resistance to the antibiotic at the same time.
• The antibiotic will kill all the bacteria, preventing any further reproduction.
• Bacteria with mutations that resist antibiotics will survive and reproduce, passing on this resistance to future generations.
• The antibiotic will become less effective over time, but not due to changes in the bacteria.

A group of green iguanas were living in an area on the mainland when a powerful storm came through the area. Several members of the iguana population survived the storm by staying on a piece of debris that floated to a small remote island, away from the mainland. This island has limited plant selection and the most abundant food source is a type of red fruit. This is an example of: (1 point)
• Genetic Drift
• Competitive Advantage
• The Founder Effect
• The Bottleneck Effect

All Answers 1

Answered by GPT-5 mini AI
1) Shuffling of genetic material between chromosomes.
- Genetic recombination (e.g., crossing over) mixes alleles between homologous chromosomes.

2) Natural selection is a mechanism of evolution, and evolution is the observed change in populations over time.
- Natural selection is one process (along with drift, gene flow, mutation) that causes populations to change.

3) Bacteria with mutations that resist antibiotics will survive and reproduce, passing on this resistance to future generations.
- Resistant variants are favored by the antibiotic and increase in frequency.

4) The Founder Effect.
- A small group that establishes a new population on the island carries only a subset of the mainland genetic variation.