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Auxin is a growth hormone released from the tip of a shoot. It is distributed uniformly along the shoot so it can diffuse down the entirety of the stem of the plant. Normally the auxin is broken down in s...
Animal and plant cells share many similarities. For example, they both have: a nucleus, which houses the genetic material; a cytoplasm, where the chemical reactions of the cell occur; a cell membrane, whi...
Diffusion is the passive (does not require energy input) movement of a substance down a concentration gradient from an area of high concentration to an a...
The role of a sperm cell is to fertilise an egg cell and pass on genetic material. The nucleus of the sperm cell contains the male genetic material/DNA. The head of the sperm cell contains many mitochondr...
An organism which feeds off the resources of its host, this has a negative impact on the host and a positive impact on the parasitic organism
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