En anglais

How plants and animals make more of their kind

Science · Ecosystems & Habitats · ages 9-10

Name ______________________ Date ____________

Which process produces a new strawberry plant asexually?
- A flower making seeds after fertilisation
- A seed sprouting after male and egg cells join
- A runner forming roots and shoots at a joint
During fertilisation in a flowering plant, what joins together?
- A pollen grain joins a flower petal.
- A male cell from pollen joins an egg cell.
- A whole seed joins a pollen grain inside a flower.
Birds hatch from eggs, but most mammals are born live.
Circle one: True False
A tulip forms additional bulbs beside its old bulb. Which part could grow into another tulip without a seed?
- One additional bulb
- A pollen grain
- One dropped flower petal
Pollen has landed on a stigma, but no male cell has joined an egg cell. Which event has happened so far?
- Pollination only
- Fertilisation only
- Both events have happened
A robin feeds its chicks after they hatch from eggs. Which claim does this observation challenge?
- Some birds provide food for chicks after the chicks hatch from eggs.
- Every egg-laying animal leaves its young without care.
- Young birds can continue growing after they hatch from their eggs.
A report describes a turtle laying 80 eggs and leaving, and an elephant giving birth to one calf and caring for it. Which conclusion is supported?
- All egg-laying animals give less care than mammals.
- These examples differ in birth method, reported number and care.
- These examples show that laying more eggs always means more young will survive.
Milo calls a coleus cutting sexual reproduction because it makes a new plant. Which fact shows why that explanation does not fit?
- The cutting turns into a whole seed before roots can grow.
- The cutting needs a pollen grain to join every new root.
- The cutting grows without fertilisation.

Answer key

For grown-ups. Fold this page away before handing over the rest.

How plants and animals make more of their kind W1-mt_yNWt3GQBNp-s1

A runner forming roots and shoots at a joint · A runner can form roots and shoots that become another plant without male and egg cells joining.
A male cell from pollen joins an egg cell. · Fertilisation joins a male cell from pollen with an egg cell. The whole pollen grain does not join the egg or turn into a seed.
True · Birds develop in laid eggs. Most mammals give birth to live young, although platypuses and echidnas lay eggs.
One additional bulb · An additional bulb can grow into a separate tulip. The old bulb sprouting again would be the existing plant regrowing.
Pollination only · Pollen arriving on a stigma is pollination. Fertilisation has not happened because the male and egg cells have not joined.
Every egg-laying animal leaves its young without care. · The robin is an egg-laying animal that cares for its chicks. This example challenges the claim that every egg-laying animal leaves its young without care.
These examples differ in birth method, reported number and care. · The report compares two examples. It gives no survival counts and cannot establish a rule for all egg-laying animals or mammals.
The cutting grows without fertilisation. · Both sexual and asexual reproduction can make new plants. The cutting is asexual because no male and egg cells join.