Question

Which descriptions of evolution are accurate? Select three options. It occurs within an individual’s lifetime.
It occurs over many generations.
It applies only to an individual.
It applies to an entire population.
It happens at the genetic level.

Answer 1

Answer:

1. It occurs over many generations.

2. It applies to an entire population.

3. It happens at the genetic level.

Explanation:

1. New gene variants ( alleles ) are produced by random mutation, and over the cause of many generations, natural selection  may favor advantageous variations , causing them to become more common in the population.

2. New traits come from transfer of genes between populations, as in migration , or between species , in horizontal gene transfer.

3. From generation to generation, well - understood molecular mechanisms reshuffle, duplicate , and alter genes in a way that produces genetic variation. This variation is a raw material for evolution.

Answer 2

Descriptions of evolution:

Evolution occurs over many generations.

It applies to an entire population.

It happens at the genetic level.

Explanation:

• The genetic variation due to evolution affects the physical characteristics of the species.
• Some of the changes in the individual gives advantages and it is passed to their offspring.
• It depends on the nature or the environment with which the organism lives and these characteristics are developed to adapt themselves to the environment.
• Some of the changes involves surviving at certain places, avoiding predators, resisting disease and finding food.