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WorksheetsASEXUAL AND SEXUAL REPRODUCTION (PLANTS)
Total questions: 10
Worksheet time: 10mins
Pollen grains are transferred from the anthers to the stigma. The pollen grains adhere to the
sticky stigma. The statements describe what happens next.
1 The pollen grain grows a pollen tube.
2 The pollen tube enters the ovule.
3 The pollen tube grows down the style.
4 The male nucleus fuses with an egg cell nucleus.
In which order do these stages occur?
1 → 2 → 4 → 3
1 → 3 → 2 → 4
2 → 3 → 1 → 4
3 → 1 → 4 → 2
Specific grape varieties are maintained using stem cuttings from mature plants that are then
planted and cultivated to produce grapes. This is an example of artificial asexual reproduction.
What is a disadvantage of using asexual reproduction to produce fruit?
An outbreak of disease will affect the whole crop in the same way.
Genetically identical fruit is produced relatively quickly
No pollination or pollinators are required
The characteristics of the grapes will vary between plants.
Which two statements are correct for the process of cross-pollination in plants?
1 increases potential for variation in offspring
2 pollen is transferred to a different flower on the same plant
3 reduces potential to respond to environmental change
4 pollen is transferred to a flower on a different plant of the same species
1 and 2
1 and 4
2 and 3
3 and 4
What is an advantage, for an organism, of using asexual reproduction?
Disease spreads rapidly.
It does not cause variation
It easily adapts to environmental change
Population increases rapidly
The diploid number in Ovis aries (sheep) is 54.
How many chromosomes will there be in a zygote of this species?
0
27
54
108
Crop plants produced by asexual reproduction are identical. This can be a disadvantage.
Which statements describe disadvantages?
1 Crop plants are produced rapidly.
2 A disease could kill all of the plants.
3 Only one parent is needed.
4 The plants cannot adapt to environmental changes.
1 and 2
1 and 3
2 and 4
3 and 4
A wind-pollinated plant has which features?
large anthers, coloured petals and produces nectar
large petals, small anthers and a sticky stigma
small petals, large anthers and a feathery stigma
small petals, produces nectar and has a strong scent
Which environmental factor is not always a requirement for seed germination?
light
oxygen
suitable temperature
water
After fertilisation, how many chromosomes are in the zygote?
half as many as in an ovum
the same as in an ovum
the same as in a sperm
twice as many as in a sperm
The diagram shows half a flower.
After pollination, where would pollen grains be found?
P and Q
Q and R
R and S
S and P
