| A | B |
| sepals | the special kind of leaves that surround the bottom of a flower |
| petals | the kinds of leaves inside the sepals, often brightly colored |
| pistil | the female reproductive organ in a plant |
| stamen | the mail reproductive organ in a flower |
| filament | the stem of the stamen that holds the anther |
| anther | part of the top of the stamen that produces pollen |
| pollen grains | male reproductive cells |
| pollination | movement of pollen from a stamen to a pistil |
| stigma | the top part of the pistil |
| style | the tube that connects the stigma to the bottom part of the pistil |
| ovary | the bottom part of the pistil |
| ovule | the part of the ovary that develops into a seed after fertilization |
| fertilization | the joining of nuclei of the male and female reproductive cells |
| undeveloped | not fully grown |
| embryo | an undeveloped plant or animal |
| seed coat | the outside covering of a seed. |
| hilum | a mark on the seed coat where the seed was attached to the ovary |
| testes | male reproductive organs in animals |
| sperm cells | male reproductive cells in animals |
| egg cells | female reproductive cells in animals |
| zygote | a new cell formed by fertilization |
| cleavage | early cell divisions in the formation of the embryo |
| larva | worm like second stage of insect development |
| pupa | third stage of insect development |
| cocoon | covering formed around the pupa |
| mammal | an animal that produces milk to feed its young |