NEET UG BIOLOGY Multiple Choice Questions (MCQs)

151. What is the correct order of floral parts, starting from the outermost part?

• a) Corolla, Calyx, Androecium, Gynoecium
• b) Calyx, Corolla, Androecium, Gynoecium
• c) Gynoecium, Androecium, Calyx, Corolla
• d) Androecium, Calyx, Corolla, Gynoecium

Answer: b) Calyx, Corolla, Androecium, Gynoecium

152. The development of male gametophyte in flowering plants occurs in:

• a) Ovule
• b) Anther
• c) Pollen grain
• d) Stigma

Answer: c) Pollen grain

153. Which of the following is NOT a type of pollination?

• a) Wind pollination
• b) Water pollination
• c) Insect pollination
• d) Osmotic pollination

Answer: d) Osmotic pollination

154. Which of the following agencies is primarily responsible for wind pollination?

• a) Bees
• b) Moths
• c) Birds
• d) Wind

Answer: d) Wind

155. Which of the following is an example of an outbreeding device in plants?

• a) Self-pollination
• b) Cross-pollination
• c) Vegetative reproduction
• d) Budding

Answer: b) Cross-pollination

156. In pollen-pistil interaction, the growth of the pollen tube is directed by:

• a) Auxins
• b) Cytokinins
• c) Gibberellins
• d) S-Glycoproteins

Answer: d) S-Glycoproteins

157. The process of double fertilization in flowering plants results in the formation of:

• a) Zygote and endosperm
• b) Embryo and seed coat
• c) Seed and ovary
• d) Ovule and pollen

Answer: a) Zygote and endosperm

158. Which of the following post-fertilization events occurs first in seed development?

• a) Development of the ovary into a fruit
• b) Formation of seed coat
• c) Development of the endosperm
• d) Formation of the embryo

Answer: c) Development of the endosperm

159. After fertilization, the ovary develops into:

• a) Seed
• b) Fruit
• c) Pollen
• d) Zygote

Answer: b) Fruit

160. The formation of endosperm in fertilized ovule is primarily responsible for:

• a) Providing nutrients to the developing embryo
• b) Forming the seed coat
• c) Producing the pollen grains
• d) Attracting pollinators

Answer: a) Providing nutrients to the developing embryo

161. Which of the following is NOT a special mode of reproduction in flowering plants?

• a) Apomixis
• b) Parthenocarpy
• c) Polyembryony
• d) Cross-pollination

Answer: d) Cross-pollination

162. Apomixis in plants refers to:

• a) Formation of seeds without fertilization
• b) Formation of seeds through sexual reproduction
• c) Reproduction through vegetative parts
• d) Formation of non-viable seeds

Answer: a) Formation of seeds without fertilization

163. Parthenocarpy refers to:

• a) Development of fruit without fertilization
• b) Development of seeds without fertilization
• c) Fertilization without pollination
• d) Formation of sterile fruits

Answer: a) Development of fruit without fertilization

164. Which of the following statements about polyembryony is true?

• a) It results in the formation of multiple embryos from a single zygote
• b) It occurs in all flowering plants
• c) It is a type of vegetative reproduction
• d) It always leads to seedless fruits

Answer: a) It results in the formation of multiple embryos from a single zygote

165. The significance of seed and fruit formation includes all of the following EXCEPT:

• a) Ensuring genetic diversity
• b) Protecting the embryo
• c) Facilitating dispersal
• d) Preventing the growth of new plants

Answer: d) Preventing the growth of new plants