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What factors affect rate of photosynthesis in a plant?

There are three key factors affecting rate of photosynthesis at GCSE level. They are light intensity, CO2 concentration, and temperature. These factors are best visualised by drawing graphs with rate of phot...
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Answered by Kieran F. • Biology tutor
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Cells go through a repeating cycle of events in growth regions such as plant root tips and animal embryos. Outline this cell cycle.

This cycle can be split into two big parts: the interphase and the dividing phase. The interphase consists of the G1, S and G2 phase. In the G phases the cell increases in size to prepare for the division an...
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Answered by Vasiliki K. • Biology tutor
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What are the differences between normal cells and cancer cells?

Cancer cells are not foreign cells, but abnormally functioning body cells, and may therefore escape immune detection, which is one of the reasons why they are so difficult to treat. Here are some differences...
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Answered by Mariana N. • Biology tutor
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How can urine be used to detect pregnancy?

The hormone Human Chorionic Gonadotrophin (HCG) starts to be secreted six days after conception from a developing embryo. A pregnancy test stick has three bands. In the first are monoclonal antibodies which ...
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Answered by Aimee W. • Biology tutor
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Outline the process of eutrophication

Eutrophication occurs when nitrate fertilisers are carried by ground water into lakes and ponds. The fertliser encourages algal growth in the water, which in turn blocks out sunlight. This causes submerged p...
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Answered by India G. • Biology tutor
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