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question_answer1) Assertion: All flowering plants of this earth show sexual reproduction. Reason: Some flowering plants perform vegetative mode of reproduction also.
question_answer2) Assertion: Several hormonal and structural changes are initiated in a plant before flowering. Reason: Flower has male and female sex organs for sexual reproduction.
question_answer3) Assertion: A typical anther of a flower is bilobed. Reason: Each lobe of anther is dithecous.
question_answer4) Assertion: Stamen has long and slender stalk called as filament. Reason: Terminal part of stamen is bilobed termed as anther.
question_answer5) Assertion: Tapetum provides nourishment to the pollen grains. Reason: Tapetum secretes enzymes as well as hormone.
question_answer6) Assertion: The hard-outer layer of pollen grain is exine. Reason: The intine of pollen grain is made up of cellulose and pectin.
question_answer7) Assertion: Papaver has multicarpellary and syncarpous type of pistil. Reason: Michelia possesses multicarpellary and apocarpous type of pistil.
question_answer8) Assertion: Central cell of embryo sac has two haploid polar nuclei. Reason: Antipodal cells are three in number in female gametophyte or embryo sac.
question_answer9) Assertion: Egg apparatus is made up of an egg cell and two synergids. Reason: Ploidy level of synergid or helper cell is diploid.
question_answer10) Assertion: Megasporanguim has one or two protective envelopes called integuments. Reason: Chalaza is the opposite to the micropylar end of ovule.
question_answer11) Assertion: In autogamy, pollination is achieved within the same flower. Reason: Autogamy induces cross pollination in flowering plants.
question_answer12) Assertion: Pollination by wind is more common amongst abiotic pollination. Reason: Wind pollination is performed in Vallisneria.
question_answer13) Assertion: Tallest flower Amorphophallus is pollinated by insects i.e., entomophily. Reason: Yucca flower also show a symbiotic relationship with insects.
question_answer14) Assertion: Continued self-pollination in flowering plants is resulted in inbreeding depressions. Reason: Flowering plants have developed many devices to discourage self-pollination.
question_answer15) Assertion: Removal of anther of a flower is referred as emasculation. Reason: If the female parent produces unisexual flower, there is a basic need for emasculation.
question_answer16) Assertion: Primary endosperm nucleus (PEN) is diploid in flowering plants. Reason: Triple fusion involves two male gametes and one egg cell.
question_answer17) Assertion: Radicle of embryo form stem and leaves of the plants. Reason: Plumule of embryo form stem and leaves of the spermatophyta.
question_answer18) Assertion: Groundnut is an example of albuminous seed. Reason: Wheat is an example of non-albuminous seed.
question_answer19) Assertion: Apple is an example of false fruits. Reason: Thalamus contributes to the formation of pseudocarpic fruits.
question_answer20) Assertion: Seed is formed without fertilisation in the members of family Asteraceae. Reason: Seedless fruits are also developed without fertilisation.
question_answer21) Assertion: In Apomixis, plants of new genetic sequences are produced. Reason: In apomixes, individuals of same genetic sequence meet.
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