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Biology
GCSE

How can plasmids be used to create transgenic plants?

The plasmid is inserted into the vector. The vector infects the plant and the plasmid is incorporated into the plant DNA. The infected cells can then be isolated as they contain the new gene from the plas...

Answered by Louise L. Biology tutor
1149 Views

Describe the coordination of a reflex action.

the receptor detects stimulus. The receptor generates an electrical impulse sent to the CNS by neurons (sensory). Chemical messengers (neurotransmitters) carry the electrical impulse across a synapse. Neu...

Answered by Fola O. Biology tutor
1319 Views

Describe the differences in structure of arteries, veins and capillaries.

Arteries: carry blood away from the heart, have thick muscular walls, have small lumens, and contains blood under high pressure.Veins: carry blood to the heart, have thin...

Answered by Mehjaben R. Biology tutor
1115 Views

Explain what the reflex arc is, how it is different to how the central nervous system normally works, and how the arc itself works.

To answer this question, you need to know what the reflex arc is and why we need it. The reflex arc is a pathway of neurones (nerve cells) and their connections (synapses) that doesn't go through the cons...

Answered by Lana B. Biology tutor
1417 Views

Describe how non-specific human defence systems stop you from falling ill. [6 marks]

your skin covers almost all parts of your body to prevent infection from pathogens, your nose has hairs within them which act as a physical barrier to infection, mucus is produced by goblet cells in your ...

Answered by Elicia C. Biology tutor
3827 Views

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