Q. 64.0( 7 Votes )
Which of the following statements is/are true for sexual reproduction in plants?
(i) Plants are obtained from seeds.
(ii) Two plants are always essential.
(iii) Fertilization can occur only after pollination.
(iv) Only insects are agents of pollination.
Choose from the options given below.
A. (i) and (iii)
B. (i) only
C. (ii) and (iii)
D. (i) and (iv)
Answer :
In sexual reproduction, new plants are produced from seeds.
Two plants are not always necessary for sexual reproduction. In bisexual flowers, there are cases where pollen lands on the stigma of the same flower (self-pollination), and then fertilization takes place.
Pollination is the process of transfer of pollen grains (which contains male gametes) to the stigma of a flower (the female reproductive part consists of stigma, style, and ovary which contains the female gametes). This process allows the contact between male and female gametes, leading to fertilization. Hence fertilization can only take place after pollination.
Pollination can be caused by different agents such as wind, water, insects etc.
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Which of the following parts of a plant take part in sexual reproduction?
(i) Flower
(ii) Seed
(iii) Fruit
(iv) Branch
Choose the correct answer from below.
NCERT - Exemplar ScienceSketch the reproductive part of a flower.
NCERT ScienceWhich of the following parts of a plant take part in sexual reproduction?
(i) Flower
(ii) Seed
(iii) Fruit
(iv) Branch
Choose the correct answer from below.
NCERT - Exemplar ScienceIn the diagram of a bisexual flower given as Figure 12.5, draw the missing part and label the parts marked (a), (b) and (c). Also label the missing part that you draw.
Pollination refers to the
NCERT - Exemplar Science