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16.2 Sexual reproduction
Core
1
Describe sexual reproduction as a process
involving the fusion of the nuclei of two gametes
to form a zygote and the production of offspring
that are genetically different from each other
Describe fertilisation as the fusion of the nuclei of
gametes
16.3 Sexual reproduction in plants
Core
1
Identify in diagrams and images and draw the
following parts of an insect-pollinated flower:
sepals, petals, stamens, filaments, anthers,
carpels, style, stigma, ovary and ovules
State the functions of the structures listed in
16.3.1
Identify in diagrams and images and describe the
anthers and stigmas of a wind-pollinated flower
Distinguish between the pollen grains of
insect-pollinated and wind-pollinated flowers
Describe pollination as the transfer of pollen
grains from an anther to a stigma
204
Supplement
3
4
State that nuclei of gametes are haploid and that
the nucleus of a zygote is diploid
Discuss the advantages and disadvantages of
sexual reproduction:
(a) to a population of a species in the wild
(b) to crop production
Supplement
9
10
1
Describe self-pollination as the transfer of pollen
grains from the anther of a flower to the stigma
of the same flower or a different flower on the
same plant
Describe cross-pollination as the transfer of
pollen grains from the anther of a flower to the
stigma of a flower ona different plant of the
same species
Discuss the potential effects of self-pollination
and cross-pollination on a population, in terms of
variation, capacity to respond to changes in the
environment and reliance on pollinators
continued