Which group is a list of blood types? a. a, b, abo b. a, b, o c. a, b, c d. ao, bo, oo

Which group is a list of blood types?

Answer B) A, B, O

Explanation : The ABO system defines four main blood groups.

Blood group A - has A antigens and anti-B antibodies.

Blood group B - has B antigens and anti-A antibodies.

Blood group O - has no antigens, but both anti-A and anti-B antibodies.

Blood group AB -has both A and B antigens, but no antibodies.

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complete the square on the right side of the equation;

-5(x + 0)^2 + 15

answer: d. y = -x^2 + 15

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: