Did large predators keep humans out of north america

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth

Nucleic acid certain protein cell membranes certain carbohydrates

Why was mendel's work not accepted at the time? o a. his results were false. o b. he did not repeat his experiments. o c. he did not have any data. o d. his results were surprising,