Which of the following helps to bundles conifer needles? *
•pollen grains
•micropyle
•fascicles
•resin

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.

the answer is c.) there is a warm front in region a and a stationary front in region b.

not sure if this what   you'r looking for would be percent composition

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).