Every card in Reproduction and genetics, Year 8: more practice
The whole deck, in order — so you can read it through before your child ever sees it.
- What does an organism that reproduces asexually not need to find, which helps it spread quickly?
A mate
HintCount how many parents it takes.
WhyWith only one parent and no gametes to join, an organism such as a bacterium or a strawberry plant never has to search for a mate, so it can spread fast.
- A new disease attacks one plant in a field of clones. Why is it likely to harm all the others too?
They are genetically identical, so they all share the same weakness
HintThink about how alike clones are inside.
WhyIn a varied population some individuals may resist the disease. In clones none has a different gene to help.
- In which organ does a baby develop during pregnancy?
The uterus (womb)
HintIt is a muscular, stretchy bag in the lower abdomen.
WhyThe uterus has a thick, muscular wall that stretches as the baby grows and pushes the baby out at birth.
- Fertilisation in humans usually happens in the ____, the tube that links the ovary to the uterus.
oviduct
HintIt is also called the fallopian tube; it begins with "ovi-".
WhyThe egg is released from the ovary into the oviduct. If a sperm reaches it there, fertilisation can happen.
- Why does a wind-pollinated plant make huge amounts of pollen?
Most pollen is wasted, so many grains are needed for a few to reach a stigma
HintWind blows randomly, so think about the odds of any one reaching a flower.
WhyThe wind does not aim, so most grains never land on a stigma. Making a lot raises the chance that some do.
- Pollen from an insect-pollinated flower is often sticky or spiky. How does this help?
It sticks to the insect's body so it is carried to another flower
HintThink about how it catches hold of a visiting bee.
WhyWhen the insect visits the next flower, some pollen rubs off onto the stigma.
- Pollen moves from the anther of one plant to the stigma of a different plant of the same species. What is this called?
Cross-pollination
HintThe pollen crosses from one plant to another.
WhyCross-pollination mixes genes from two plants, so the seeds produced are more varied.
- After a pollen grain lands on the stigma, how does the male gamete reach the ovule?
Through a pollen tube that grows down the style
HintA thin pathway forms inside the female part, heading for the ovule.
WhyThe pollen tube grows down through the style to the ovary and the ovule, where the male gamete fuses with the female gamete.
- After fertilisation, the ovules become seeds. What does the ovary become?
The fruit
HintIt surrounds and protects the seeds.
WhyThe wall of the ovary swells into the fruit, such as a pea pod or an apple.
- Why is it better for a plant to scatter its seeds away from the parent?
Less competition with the parent and each other for light, water and nutrients
HintThink about what crowded plants would fight over.
WhySeeds that land far away also help the species spread into new areas.
1★ KS3-BIOL-REP-0057
2★ KS3-BIOL-REP-0058
3★ KS3-BIOL-REP-0059
4★ KS3-BIOL-REP-0060
5★ KS3-BIOL-REP-0061
6★ KS3-BIOL-REP-0062
7★ KS3-BIOL-REP-0063
8★ KS3-BIOL-REP-0064
9★ KS3-BIOL-REP-0065
10★ KS3-BIOL-REP-0066
Keep what you learn
Here, nothing is saved. In your child’s own sky every card is scheduled — it comes back just before they’d forget it — and the professor who wrote it is one tap away.