Glossary of biology

3. A young animal developing inside the uterus.
5. Parts of a chromosome that determine a feature of an organism.
7. To do with a fetus.
8. The loss of water vapour from a plant‘s leaves.
11. Small holes in the epidermis of a leaf, which allow gases to diffuse into and out of the leaf
14. Long threads of DNA, found in the nucleus of a cell.
16. A substance containing minerals, which is added to soil to help plants to grow well.
17. A green pigment found inside chloroplasts in some plant cells, which captures energy from light.
18. Long, hollow tubes through which water moves in a plant; they are made up of dead, empty cells joined end to end.
19. The loss of large numbers of species.
20. Specialised cells on the outer surface of a root, which absorb water and mineral ions from the soil.

1. The way that plants make glucose and oxygen from carbon dioxide and water, using energy from light.
2. The strength or quantity of light.
4. collapsed; plant leaves become like that if they are short of water.
6. A meteor that has landed on the surface of the Earth.
9. The pathway by which carbon atoms cycle between organisms and the environment.
10. Meteoroids as they are moving through the Earth's atmosphere.
12. The quantity of a crop that is harvested.
13. Objects in space that are smaller than an asteroid.
15. partly-melted snow