Humans are diploid (2n), but many animals and plants are not. Weirdly enough, many domesticated crop plants are thought to have originated when two different species of plants with different ploidies were crossed. If I successfully crossed an octoploid (8n) plant with a diploid (10n) plant, what would the resulting ploidy of the offspring be

the answer is b

explanation:

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.

yes, because even though a theory has a  lot of evidence to support it, it is not always true