Cells

3. The overall movement of particles of gas or liquid from an area of higher to lower concentration.
5. A fertilised ovum (egg cell) before it has divided into an embryo.
9. A chemical reaction that occurs in the chloroplasts of plants in which the energy in light is stored in glucose.
12. The spongy tissue found in the centre of the largest bones
13. The regions of plants at their root and shoot tips where stem cells divide.

1. Offspring genetically identical to their parent.
2. A measure of the range of living organisms within a habitat.
4. Green pigment found within chloroplast that enables the process of photosynthesis to occur.
6. Stem cells found in children and adults that can only differentiate into one or several cell types.
7. The tissue surrounding the root of a hair.
8. Stem cells found in embryos that can differentiate into all cell types.
10. A bundle of several hundred cells that has developed from a fertilised ovum.
11. An expert in the scientific study of plants.