Top answers

Biology
A Level

What is a neuron and its function?

The neuron is the basic working unit of the brain, a specialized cell designed to transmit information to other nerve cells, muscle, or gland cells. Neurons are cells within the nervous system that transm...

MB
Answered by Marie B. Biology tutor
17886 Views

Describe the role of RuBISCO in photosynthesis.

RuBISCO is an enzyme that is involved in the light independent reactions of photosynthesis, specifically, in the Calvin Cycle. This reaction takes place in the stroma. It catalyses the reaction of carbon ...

CD
Answered by Claudia D. Biology tutor
31416 Views

Outline the structure and function of the plasma membrane

The plasma membrane is composed of a phospholipid by-layer. These phospholipid molecules are arranged in a double sheet which are stable yet fluid. These molecules have hydrophobic tails and hydrophilic h...

NL
Answered by Nathan L. Biology tutor
6278 Views

How does the electrical system of the heart work?

The electrical activity of the heart begins in the sinoatrial node which is a collection of pacemaker cells located in the right atrium. These cells spread electrical activity across the atrium causing bo...

EM
Answered by Emma M. Biology tutor
3421 Views

What conditions are needed for evolution by natural selection to arise?

Evolution by natural selection arises when these three properties are present in a system

  • Heredity - offspring resemble their parents in discrete characteristics.

  • Variat...

RA
Answered by Richard A. Biology tutor
3247 Views

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