3. Speciation occurs when: * 1. two populations become geographically isolated
2.enough differences accumulate between two populations that they can no longer
interbreed
3.gene mutations accumulate
4.all of the above

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation:

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher