Science Group
Explore subjects and practice MCQs
7
Chapters
1,610
Total MCQs
Science Group
Answer: Insects visiting flowers pick up pollen and carry it to other flowers, helping in pollination.
Answer: Animals eat fleshy fruits and disperse the tough seeds through their digestive system or by dropping them elsewhere.
Answer: The feathery pappus of dandelion seeds acts like a parachute, allowing wind to carry them far away.
Answer: Germination requires water to soften the seed coat and oxygen for respiration, along with a suitable temperature.
Answer: Coconut fruits float in water, so they are dispersed by ocean and river currents to distant shores.
Answer: Oxygen is needed for the respiration of the germinating seed to release energy from stored food.
Answer: The scutellum is the single cotyledon of monocot seeds such as maize and wheat.
Answer: In budding, the new individual arises from a small outgrowth (bud) on the parent's body, as in yeast.
Answer: Cotyledons store food that supplies energy and materials to the seedling until it can photosynthesize.
Answer: Grafting is an artificial method of vegetative propagation in which parts of two plants are joined together.
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.