Pollen- a substance that contains the reproductive cells of a plant. When combined with a female plant cell, a seed forms.

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

i won't lie i don't know so go online and ask google thats what i do