Definitions

1. A factor whose level is at the least favourable and therefore limits the rate at which the process can take place. (8, 6)
3. A pore surrounded by two guard cells, mostly in the lower epidermis of a leaf, through which gases diffuse in and out of the leaf. Matrix of a chloroplast where the light-independent reaction of photosynthesis takes place. (6)
4. Series of flattened membranous sacs in a chloroplast that contain chlorophyll and the associated molecules needed for the light-dependent reaction of photosynthesis. (9)
5. Series of aerobic biochemical reactions in the matrix of mitochondria of most eukaryotic cells by which energy is obtained through the oxidation of acetylcoenzyme A produced from the breakdown of glucose. (5, 5)
7. Term used to describe a large area of land in which only one type of crop is grown. (11)
10. Group of individuals that share similar genes and are capable of breeding with one another to produce fertile offspring. (7)

2. Gases such as methane and carbon dioxide which in the atmosphere cause more heat energy to be trapped, so raising the temperature at the Earth’s surface. (10, 5)
3. The process by which organisms that are better adapted to their environment survive and breed, while those that are less adapted fail to do so. (9)
8. A plant adapted to living in dry conditions. (9)
9. An ecosystem in water. (7)

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