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Study the given statements about gymnosperms and select the correct option.
(i) Mode of fertilization is siphonogamy.
(ii) Male and female cones are borne on same tree in Pinus.
(iii) Endosperm represents female gametophyte.
  • a)
    Statements (i) and (ii) are correct
  • b)
    Statements (ii) and (iii) are correct
  • c)
    Statements (i) and (iii) are correct
  • d)
    Statement (i), (ii) and (iii) are correct
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Study the given statements about gymnosperms and select the correct op...
Explanation:

The correct option is (d) Statement (i), (ii), and (iii) are correct.

Statement (i): Mode of fertilization is siphonogamy.

Siphonogamy is the mode of fertilization in gymnosperms. It involves the transfer of male gametes (sperm) to the female gametophyte through a pollen tube. This process occurs after pollination, when pollen grains are transferred from the male cone to the female cone.

Statement (ii): Male and female cones are borne on the same tree in Pinus.

This statement is correct. In Pinus (a type of gymnosperm), the male and female cones are borne on the same tree, but on different branches. The male cone is smaller and produces pollen grains, while the female cone is larger and contains ovules.

Statement (iii): Endosperm represents the female gametophyte.

This statement is correct. In gymnosperms, including Pinus, the female gametophyte is represented by the endosperm. The endosperm is a nutritive tissue that surrounds and nourishes the developing embryo. It is formed as a result of the fusion of the male gamete (sperm) with the two polar nuclei of the female gametophyte.

Therefore, all the given statements are correct.
Community Answer
Study the given statements about gymnosperms and select the correct op...
In gymnosperms fertilization occurs by siphonogamy, i.e., the male gametes are carried to the archegonia through pollen tube (except in Cycas where pollen tube functions as haustorium and fertilization occurs by zoodiogamy). The diploid zygote develops into an embryo while still enclosed within the ovule and the ovule becomes a seed. The wall of ovule becomes the seed coat. During seed development, the food laden tissue of the female gametophyte (or endosperm) supplies nutrient for the development of embryo and for future growth of embryo into seedling. Conifers are usually monoecious, i.e., male and female cones are borne on the same plant example, Pinus.
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Study the given statements about gymnosperms and select the correct option.(i) Mode of fertilization is siphonogamy.(ii) Male and female cones are borne on same tree in Pinus.(iii) Endosperm represents female gametophyte.a)Statements (i) and (ii) are correctb)Statements (ii) and (iii) are correctc)Statements (i) and (iii) are correctd)Statement (i), (ii) and (iii) are correctCorrect answer is option 'D'. Can you explain this answer?
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