Science Group
Explore subjects and practice MCQs
10
Chapters
1,000
Total MCQs
Unit-9 Plant Reproduction
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.
Answer: Vegetative propagation is asexual because new plants arise from vegetative parts without gamete fusion.
Answer: Vegetative propagation relies only on mitotic division, so all offspring are identical to the parent.
Answer: The plumule is the embryonic shoot; it grows upward to form the stem and leaves.
Answer: Vegetatively propagated plants grow faster and reach the flowering and fruiting stage sooner than seed-grown plants.
Answer: Pollination is part of sexual reproduction; budding, fragmentation and spore formation are asexual methods.
Answer: Farmers use vegetative propagation to preserve the desirable traits of the parent plant exactly.
Answer: Wheat and maize are monocots whose single cotyledon (scutellum) remains below ground, showing hypogeal germination.
Answer: The pistil is made of the stigma, style and ovary; the anther is part of the stamen, not the pistil.
Answer: Germination begins when the seed absorbs water, which activates its metabolism.
Answer: Sunlight is not needed because germinating seeds use stored food; water, oxygen and suitable temperature are essential.