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What is homeostasis?

Homeostasis is defined as the maintenance of a constant internal environment in the body. An example of this would be the blood glucose level: After a meal, a person's blood glucose level would be high. This...
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Answered by Lauren S. • Biology tutor
5444 Views

How do bacteria acquire resistance to antibiotics?

Spread of mutations via vertical and horizontal transmission Once a bacterium has a mutation that provides resistance to an antibiotic, it can spread through replication or through direct transmission to oth...
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Answered by Hannah L. • Biology tutor
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What are the limiting factors of Photosynthsis

Photosynthesis requires optimal temperatures, high levels of light, and carbon dioxide. The limiting factor of photosynthesis is the factor with the least favourable level; ie. increasing this will increase ...
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Answered by Zuhayr A. • Biology tutor
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How does natural selection work?

Note: Keywords which are vital for marks will be highlighted in bold. Within all populations, there is variation. This is due to different alleles (types) of different genes being present in different indivi...
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Answered by Zuhayr A. • Biology tutor
7410 Views

What are the different types of immunity?

Firstly, you need to understand that there are two main types: Passive Immunity and Active Immunity. We will take them one by one and break them down now. 1. Passive Immunity: As its name suggests, passive i...
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Answered by Bogdan C. • Biology tutor
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