Edexcel A-Level Biology: Chemical Control in Mammals and Plants
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Questions and Answers

What is the role of hormone receptors in chemical control in mammals?

Hormone receptors receive hormone signals and trigger a response.

What is the role of negative feedback in maintaining homeostasis in mammals?

Negative feedback reverses the deviation, returning the variable back to its set point.

What is the function of auxins in plant growth and development?

Auxins promote cell elongation and differentiation, influencing plant growth and development.

How do gibberellins influence plant growth and development?

<p>Gibberellins stimulate cell elongation, seed germination, and stem elongation.</p> Signup and view all the answers

What is the role of abscisic acid in plant responses to stress?

<p>Abscisic acid triggers stomatal closure, reducing water loss in response to drought stress.</p> Signup and view all the answers

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