Science Group
Explore subjects and practice MCQs
10
Chapters
1,000
Total MCQs
Unit-9 Plant Reproduction
Answer: Hooked and barbed seeds cling to the fur of animals, which carry them to new places.
Answer: Water activates the enzymes that digest stored food in the seed, so without water germination cannot begin.
Answer: Cutting is an artificial method in which a piece of stem is planted and grows into a new plant, as in roses.
Answer: Maple fruits have wing-like outgrowths that help the wind carry them away from the parent tree.
Answer: Brightly coloured and fragrant petals attract insects, which bring about pollination.
Answer: Sweet, fleshy fruits attract birds and animals, which eat them and disperse the seeds.
Answer: In epigeal germination of bean, the elongating hypocotyl pushes the cotyledons above the soil.
Answer: Sexual reproduction requires the fusion of male and female gametes to form a zygote.
Answer: Parthenogenesis is the development of an embryo from an unfertilized egg, without gamete fusion.
Answer: A bisexual (hermaphrodite) flower contains both stamens and a pistil.
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.