Topic 7 - Sexual Reproduction in Plants

Question 1

what is the stamen?

Answer 1

the male reproductive part, consisting of the anther and filament

Question 2

what is the anther?

Answer 2

the anther contains pollen grains which produce the male gametes

Question 3

what is the filament?

Answer 3

the stalk which supports the anther

Question 4

what is the carpel?

Answer 4

the female reproductive part, consisting of the ovary, style and stigma

Question 5

what is the stigma?

Answer 5

the part that pollen gains attach to

Question 6

what is the style?

Answer 6

the rod-like section that supports the stigma

Question 7

what is the ovary (plant)?

Answer 7

contains the female gametes inside ovules

Question 8

what is pollination?

Answer 8

the transfer of pollen from an anther to a stigma, so the male gametes can fertilise the female gametes in sexual reproduction

Question 9

what is cross-pollination?

Answer 9

a type of sexual reproduction where pollen is transferred from the anther of one plant to the stigma of another

Question 10

what do cross-pollinating plants rely on to help them pollinate?

Answer 10

insects or the wind

Question 11

how are plants adapted for insect pollination?

Answer 11

1. brightly coloured petals to attract insects
2. scented flowers and nectaries to attract insects
3. big sticky pollen grains which stick to insects as they go from plant to plant
4. sticky stigma so pollen brought by insects will stick to the stigma

Question 12

how are plants adapted for wind pollination?

Answer 12

1. small, dull petals
2. no nectaries or scents
3. a lot of small and light pollen grains to be easily carried
4. long filaments that hang the anthers outside the flower so lots of the pollen gets blown away
5. a large and feathery stigma to catch pollen. it also often hangs outside the flower