CBSE Questions for Class 7 Biology Reproduction In Plants Quiz 2 - MCQExams.com

• The flowers perform the function of sexual reproduction in plants. Flowers are known as the reproductive parts of a plant.
• While the other parts such as stem, leaf, and root have no role in sexual reproduction and are known as vegetative parts of a plant.
• Hence, Option B is correct.
  

• A flower typically consists of petals, sepals, stamen, and pistil (carpel). 
• Stamen is the male reproductive part of a flower and the pistil is the female reproductive part of a flower. 
• Some flowers may carry both stamen and pistil in the same flower and are called bisexual flowers (as both the sexes are present in the same flower) and some flowers may have separate male and female flowers and are called unisexual flowers. 
• The male flower has only the stamen and no pistil while the female flower has only the pistil and no stamen.

• Vegetative plant propagation is often done with stems. Sections of stems that contain nodes and internodes are used in an effective way to propagate many ornamental plants.
• When they are planted in soil, stem cuttings generate roots and eventually sprout new plants.
• Plants like roses, bougainvilleas, chrysanthemums, grapes, sugarcane, bananas, and cactus are commonly propagated through stem cuttings.  

So, the correct answer is B.

A) Correct option B

B)  Explanation for the correct option:

• X in the given figure is the eyes of potatoes.
• Potatoes have modified stems that have eyes at the nodes of the tuber. In the right conditions, these eyes can help a potato plant grow new branches.

• In flowering plants, the unisexual male flower is staminate, i.e., bearing stamens, while the female flower is pistillate i.e., bearing pistils. 
• Species with both male flowers and female flowers on the same plant are monoecious, while species in which the male flowers are on one plant and the female flowers are on another are dioecious.”
  

• Pollen or pollen grains are produced in the male reproductive part (anther) of a flowering plant. The pollen contains the male gametes, one of which fuses with the female gamete (egg) to form the seed. The seed later forms the new plant.
• Thus, the given statement is True.

• A potato tuber has many buds (called eyes) on its body which appear like scars.
• When a potato tuber is planted in the soil, then all the buds of the potato tuber start growing to produce new potato plants. Thus, one old potato tuber can produce many new potato plants.
  
• So, after few days from when Megha and Farheen placed a potato in the soil, small young roots and shoots will start arising from the eyes.