Which of the following describes the main advantage of embryo transfer? o It reduces the spread of sexually transmitted diseases (STDs).
o It produces many more offspring from one superior female.
o It produces genetically similar animals needed for research.
O It is an easy and cost-effective method of breeding.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

wegner's theory did not explain how the continents could move

explanation: