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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
31792 Views

Nitrogen reacts with hydrogen to produce ammonia. Calculate the mass of ammonia made from 84.0g of nitrogen.

(1) First, write out the equation if it is not given: N 2 + 3H 2 ---> 2NH 3 (2) Calculate the moles of nitrogen in the reaction using the information you have; in this case it is mass and relative formula...
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Answered by Thivya T. • Chemistry 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
8063 Views

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
6150 Views

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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