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Describe what is meant by photoperiodism

A response controlled by relative light and dark periods. The name of the receptors responsible for absorbing light are phytochromes. The photoperiodic stimulus is detected by the leaves of the plant.
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Answered by Amy O. • Biology tutor
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Describe the reflex arc.

A stimulus (for example a pin) stimulates the receptor which causes a nerve impulse in the sensory neuron. The impulse travels to a synapse in the spinal cord, where chemicals diffuse across the gap in the s...
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Answered by Sophie S. • Biology tutor
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What is a metabolic rate?

The rate of chemical reactions within the body.
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Answered by Sophie S. • Biology tutor
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Could you run through the stages in the light-independent reaction (Calvin Cycle) of photosynthesis?

Okay, so here we have what seems like a very daunting ​ list of chemical reactions to remember that don't seem to make any sense! But don't worry ​, with practice you will soon grasp the concept quickly. ​ L...
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Answered by Shane C. • Biology tutor
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What are the causes of genetic mutations ?

Muataions within genes can be caused by several ways. Sometimes they can be spontaneous or other times they can be induced by environmental factors. These factors can include chemicals such as chemicals foun...
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Answered by Amy M. • Biology tutor
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