Science Group
Explore subjects and practice MCQs
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Total MCQs
Science Group
Answer: Cross-pollination mixes genes from two parents, producing greater genetic variation in the offspring.
Answer: Insect-pollinated flowers have sticky, rough pollen so that it clings to the insect's body.
Answer: Burr-type seeds with hooks stick to the fur of animals and are carried to new locations.
Answer: Insects locate flowers by their bright colours and strong scents, and visit them for nectar.
Answer: The seed coat is the protective outer covering that protects the embryo from damage and drying.
Answer: The filament is the stalk of the stamen that holds the anther in a suitable position.
Answer: For grafting to succeed, the scion and stock must be closely related so their tissues can unite.
Answer: The embryo is the baby plant inside the seed, formed from the zygote after fertilization.
Answer: The ovary contains one or more ovules, each holding an egg cell.
Answer: In cereals such as wheat and maize, the grain is actually a dry fruit in which the seed is fused to the fruit wall.
Answer: Wind pollination is wasteful, so these plants release huge amounts of pollen to increase the chance of reaching a stigma.
Answer: The seed coat is derived from the integuments of the ovule that enclose the embryo sac.
Answer: In fragmentation, a filament simply breaks into pieces, and each piece grows into a new alga.
Answer: The zygote divides repeatedly and develops into the embryo within the seed.
Answer: Ferns, mosses and fungi release spores, tiny reproductive cells that grow into new individuals.
Answer: Water plants such as lotus are dispersed by water because their fruits and seeds can float.
Answer: Parthenogenesis produces a new embryo from an unfertilized egg, whereas parthenocarpy produces only fruits.
Answer: Bright, scented flowers are pollinated by insects that are attracted by the colour and fragrance.
Answer: Seeds of each species have their own optimum germination temperature, so the required suitable temperature varies.
Answer: The radicle is the embryonic root that grows downward during germination.