biology

Question 1

parts of flower

Answer 1

The male sex cells are
contained in the pollen
grains produced in the
anther.

The female sex cells
(egg cells / ova) are
produced in the ovule,
found in the ovary.

Question 2

pollination

Answer 2

Pollination occurs when pollen is
transferred from the stamen to the stigma.

Question 3

self pollination

Answer 3

Self-pollination occurs within the
same plant: this could happen on its own, or with the aid of insects.

Question 4

cross pollination

Answer 4

Cross-pollination occurs between different plants
of the same species: this requires the pollen to
be blown by wind or transferred by insects.

Question 5

fertilisation

Answer 5

A tube grows out of the pollen grain
and grows down the style.
The pollen nucleus then moves down the tube.
The pollen nucleus fuses with the egg
cell – this is called fertilisation.
The ovule becomes a seed and the
ovary becomes a fruit.

Question 6

what are the two types of seed dispersal

Answer 6

Wind dispersal is common for
smaller, lighter seeds, which
can be blown across a large area.

Water dispersal is used when plants
grow near water – seeds can be
carried far away by rivers and
streams.

Question 7

germination

Answer 7

Germination is the process in which a plant emerges from a seed and begins growing.

Question 8

asexual reproduction in plants

Answer 8

The plant sends runners across the ground, which sprout roots at various intervals, where new
plants grow. Once the plants are
established, the runners die and rot away.