What is genetic variation?

select one:
a. the selection of desirable traits in individuals that increase likelihood of survival
b. the control center of the cell
c. drastic changes to an environment
d. differences with a population of the same species

question 2

- the allele for a widow's peak is dominant over the allele for a hairline with no peak. it is an example of

- the relative frequency of an allele is the allele occurs in a gene pool, compared with the number of times other alleles for the same gene occur. relative frequency is often expressed as a percentage.

- height in humans is one example of

- a gene pool consist of all genes, including all the different alleles, that are present in a population.

answers for those for are
multigenic trait
polygenic trait
single gene trait
bigenic trait
relative frequency
gene pool

Your answer would be "Drastic changes to an environment"

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.