Science Group
Explore subjects and practice MCQs
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Total MCQs
Science Group
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.
Answer: Evolution is the gradual change in the inherited characteristics of living organisms over successive generations and long periods of time.
Answer: The word evolution is derived from the Latin word 'evolvere' which means 'to unfold' or to develop gradually.
Answer: Lamarck proposed the theory of inheritance of acquired characteristics and the principle of use and disuse of organs.
Answer: Darwin published his ideas on natural selection in 'The Origin of Species' in 1859.
Answer: Darwin's 'On the Origin of Species' was published in 1859.
Answer: Use and disuse is part of Lamarck's theory, not Darwin's theory of natural selection.
Answer: Lamarck suggested that giraffes stretched their necks to reach leaves on tall trees, and this acquired trait was passed to offspring.
Answer: Overproduction leads to more individuals than resources, causing a struggle for existence among them.
Answer: The term 'survival of the fittest' was introduced by Herbert Spencer, though it is commonly associated with Darwin's ideas.
Answer: Lamarck's theory states that characteristics acquired during the lifetime of an organism can be inherited by its offspring.