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Explain active transport and give an example to demonstrate this in both plants and animals

Active transport is the movement of a substance from an area of low concentration to an area of high concentration. This process requires energy, usually in the form of ATP, as the direction of movement is a...
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Answered by Katie M. • Biology tutor
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Why is the Nitrogen cycle so important to understand? Name key uses of Nitrogen in the living world.

Nitrogen: Is used throughout the living world as it is one of the main components of the DNA and RNA. Every base (adenine (A), cytosine (C), guanine (G), thymine(T), and uracil (U)) consists of at least two ...
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Answered by Felicitas P. • Biology tutor
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What is genetic drift?

Genetic drift is any change to the gene pool of a population (the total set of genes they have as a group) that is NOT a caused by selection. They can be thought of as 'random' changes, unlike natural select...
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Answered by Michelle H. • Biology tutor
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I don't understand anaerobic respiration and what an 'oxygen debt' is?

Respiration can be broken down into 'aerobic' and 'anaerobic' respiration. Aerobic respiration needs oxygen to be carried out, whereas anaerobic respiration takes place without oxygen. Glucose is broken down...
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Answered by Kajol M. • Biology tutor
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What is an example of a human effect on biodiversity?

Biodiversity is defined as the range of different organisms that live in a particular ecosystem (the living and non-living components of an area, and how they interact to produce a system.) An example would ...
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