1. Which accurately describes solar weather? Choose the two correct answers.

a. The intensity of solar weather changes frequently.
b. Solar flares and sunspots increase as solar minimum approaches.
c. Solar flares and sunspots increase as solar maximum approaches.
d. The intensity of solar weather is constant and unchanging.

A and C

Explanation:

This is due to the intensity of the frequent solar weather changes and as the maximum solar approaches the solar flare and sunspots increases

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation: