Suppose different species of sea urchins release gametes into the ocean at the same time. The inability of sperm and egg cells of different species to unite and form a zygote due to structural differences is an example of

Ayoung boy has been found and police are trying to locate his family they take a dna sample from him and begin collec dna samples from families who have missing children if police use dna samples only from the fathers, which type of dn technology can they use to identify the boy's parent? y-chromosome analysis omtdna (mitochondrial dna) analysis vntrs (variable tandem repeats) o pcr (polymerase chain reaction) analysis

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only

This is a scaffolding of protein fibers that us sell keep it shape in a cell division and cell movement