GCSE Science Unit 1 Biology

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Write down a pair of sex chromosomes that are in each cell of a human male.
XY
1 of 10
Explain how equal numbers of female and male offspring are produced.
XX and XY are seen as the parent genotypes & XX and XX and XY and XY are seen as offspring genotypes.
2 of 10
The position of the eyes on the head of a macaw makes it difficult to judge distance. Explain why.
The macaw has monocular vision and cannot compare images from both eyes.
3 of 10
The retina is part of the eye. Describe the job of the retina.
The retina is part of the eye that contains receptors that can detect light.
4 of 10
It takes 120 minutes to remove the alcohol from the blood. This is different to the average adult. Explain why.
He may have a different mass, weight or size than an average adult.
5 of 10
Explain how depressants slow down the transmission of nerve impulses.
They act on synapses by the depressant blinding with the receptor molecule.
6 of 10
Write down two ways to reduce high blood pressure.
Regular exercise and loose weight.
7 of 10
Explain how sweating works and why it is necessary.
Works through evaporation and is important to maintain body temperature of lose extra heat.
8 of 10
Measles, mumps and rubella cannot be treated with antibiotics. Suggest why.
As they are diseases not caused by bacteria.
9 of 10
Explain how vaccination (immunisation) works.
Harmless pathogens carry antigens, white blood cells carry antibodies and the memory cells remain.
10 of 10

Other cards in this set

Card 2

Front

Explain how equal numbers of female and male offspring are produced.

Back

XX and XY are seen as the parent genotypes & XX and XX and XY and XY are seen as offspring genotypes.

Card 3

Front

The position of the eyes on the head of a macaw makes it difficult to judge distance. Explain why.

Back

Preview of the front of card 3

Card 4

Front

The retina is part of the eye. Describe the job of the retina.

Back

Preview of the front of card 4

Card 5

Front

It takes 120 minutes to remove the alcohol from the blood. This is different to the average adult. Explain why.

Back

Preview of the front of card 5
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