In guinea pigs, the allele for short hair (S) is dominant over long hair (s). If two heterozygous short-haired guinea pigs mate, what percentage of their offspring will have long hair?​

75% long hair

Explanation:

If you use a table and put Ss for one parent on top and Ss one the side for the other parent you get the result of SS Ss Ss ss which means 75% long hair.

which

what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.