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Why might the stomata of a leaf close on a hot day?

Despite the fact that the stomata open in response to light, they may close on a hot day in order to conserve water. This is because the heat may cause the water to evaporate out through the stomata, causing...
RD
Answered by Rebecca D. • Biology tutor
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What is a pathogen? and how does it cause disease?

Pathogens are microorganisms that cause disease. They may be bacteria, viruses, protists or funghi. They can infect animals and plants, causing a wide range of diseases. Pathogens, such as bacteria and virus...
HP
Answered by Hugh P. • Biology tutor
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What is the function of a neurone?

The CNS (Central Nervous System) consists of the brain and the spinal cord. Neurones, found in the nervous system, are nerve cells that carry information in the form of electrical signals/impulses. There are...
VR
Answered by Vinya R. • Biology tutor
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What are the events that lead to synaptic transmission between two neurons?

There are three compartments to consider- the presynaptic neuron, the synaptic cleft and the postsynaptic neuron. In a classical excitatory synapse: 1. An action potential arrives at the presynaptic neuron, ...
HH
Answered by Holly H. • Biology tutor
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Describe the action of enzymes including how they are denatured, using the lock and key model

The key is the enzyme and substrate is the lock. Like a key only unlocks one lock, the active site on the enzyme only fits in 1 type of substrate. Extreme temperature or pH (how acidic something is) denature...
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Answered by Emily T. • Biology tutor
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