Biology

Reproduction and genetics, Year 7: more practice

Professor DarwinReproduction & Genetics10 cardsFree · no account needed

AQAEdexcelOCRKS3 groundwork for inheritance and genetics — what GCSE builds on at all three boards.

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Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Fill the gapAnswer in your head…The main male sex hormone, made in the testes, is ____.

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★ KS3-BIOL-REP-0047Front

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

testosterone

HintIt begins with "testo-", like the organ that makes it.

The whyTestosterone causes a boy's voice to deepen, his body hair to grow and his testes to start making sperm.

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Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Answer in your head…Name the main female sex hormone, made in the ovaries, that causes breasts to develop and periods to start.

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★ KS3-BIOL-REP-0048Front

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Oestrogen

HintIt begins with "oe-".

The whyOestrogen also helps control the menstrual cycle once periods have begun.

★ KS3-BIOL-REP-0048Back

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Answer in your head…During puberty there is a short, fast burst of increase in height. What is it called?

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★ KS3-BIOL-REP-0049Front

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

A growth spurt

HintThink of a sudden short burst of speed.

The whyGrowth spurts happen at different ages for different people, so friends can differ a lot in height for a while.

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Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Answer in your head…Hormones in puberty can make feelings change quickly, from happy to upset and back again. What is this called?

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★ KS3-BIOL-REP-0050Front

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Mood swings

HintFeelings that rise and fall like a playground ride.

The whyMood swings are a normal emotional change in puberty. Talking to someone you trust can help.

★ KS3-BIOL-REP-0050Back

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Answer in your head…The sticky top of a flower's female part, where pollen must land

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★ KS3-BIOL-REP-0051Front

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

The stigma

HintPollen has to stick here for the next stage to happen.

The whyThe stigma sits at the top of the style. Its sticky surface catches pollen grains.

★ KS3-BIOL-REP-0051Back

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Answer in your head…In a flower, the stamen and the carpel are the two reproductive parts. Which one is the female part?

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★ KS3-BIOL-REP-0052Front

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

The carpel

HintThe stamen has the anther. The female part holds the ovary.

The whyThe carpel is made of the stigma, the style and the ovary. The stamen is made of the anther and its filament.

★ KS3-BIOL-REP-0052Back

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Answer in your head…Inside the ovary of a flower are small structures that each contain a female gamete and can become a seed after fertilisation. What are they called?

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★ KS3-BIOL-REP-0053Front

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Ovules

HintEach one can become a seed after fertilisation.

The whyAn ovule contains the female gamete. After fertilisation the ovule grows into a seed.

★ KS3-BIOL-REP-0053Back

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Answer in your head…Why is a life cycle drawn as a circle, not a straight line?

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★ KS3-BIOL-REP-0054Front

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

The offspring grow up and reproduce, so the cycle starts again

HintWhat does the new generation do when it grows up?

The whyEach generation produces the next, so the stages repeat over and over.

★ KS3-BIOL-REP-0054Back

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Answer in your head…In a butterfly's life cycle, which stage comes between the caterpillar and the adult?

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★ KS3-BIOL-REP-0055Front

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

The pupa (chrysalis)

HintThe caterpillar stays still inside a case while its body is rebuilt.

The whyThe order is egg, caterpillar (larva), pupa, adult butterfly.

★ KS3-BIOL-REP-0055Back

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

Answer in your head…A young frog lives in water, breathes with gills and has a tail but no legs at first. What is this stage called?

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★ KS3-BIOL-REP-0056Front

Biology · Reproduction and genetics, Year 7: more practiceProfessor Darwin

A tadpole

HintIt hatches from frogspawn.

The whyThe order is egg (spawn), tadpole, young frog, adult frog. The tadpole grows legs and lungs as it changes.

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Reproduction and genetics, Year 7: more practice

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