When individual organisms of two populations can no longer mate to produce fertile offspring, the two populations are considered to be

different families
same species
different species
unrelated
du

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.

What best explains the inability for life to exist in earth early atmosphere

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give