145. In the cells in the root of an Angiosperm have 12 chromosomes, 6 chromosomes will be present in
(a) Synergid
(b) Endosperm cell
(c) Leaf cell
(d) Cytodeolary cell ✅
146. Meiotic division in an ovule takes place in
(a) Nucleus
(b) Megaspore mother cell ✅
(c) Megaspore
(d) Archesporium
147. The formation of fruits without fertilization is known as
(a) Parthenocarpy ✅
(b) Parthenogenesis
(c) Polyembryony
(d) Tissue culture
148. Formation of embryo from an unfertilized egg is called
(a) Parthenocarpy
(b) Pseudogamy
(c) Amphimixis
(d) Parthenogenesis ✅
149. A typical angiospermic embryo sac is usually
(a) One-celled
(b) Two-celled
(c) Four-celled
(d) Seven-celled ✅
150. Pollen grains in Angiosperms contain
(a) Single prothallial cell ✅
(b) Two prothallial cells
(c) Three prothallial cells
(d) No prothallial cell
151. After demonstration of totipotency, a Botanist wishes to produce identical plants from an angiosperm by tissue culture. The parts or tissues which are likely to yield haploid embryos are
(a) Root tips
(b) Stem apices
(c) Leaves
(d) Anthers ✅
152. Which of the following events is not directly affected by light in a vegetable garden?
(a) Seed germination
(b) Flowering ✅
(c) Food manufacture
(d) Fertilization
153. An example of a naturally occurring parthenocarpic fruit is
(a) Guava
(b) Banana ✅
(c) Apple
(d) Mango
154. The production of a gametophyte directly from the sporophyte without meiosis is called
(a) Apospory ✅
(b) Apogamy
(c) Parthenogenesis
(d) Apomixis
155. The normal or Polygonum type of embryo sac is
(a) Bisporic eight-nucleate
(b) Monosporic four-nucleate
(c) Tetrasporic sixteen-nucleate
(d) Monosporic eight-nucleate ✅
156. When pollen tube enters by integument, the process is called
(a) Mesogamy
(b) Porogamy ✅
(c) Chalazogamy
(d) Syngamy
157. Nucellar embryo is
(a) Apomictic haploid
(b) Amphimictic haploid
(c) Apomictic diploid ✅
(d) Amphimictic diploid
158. Which of the following is correct statement?
(a) Gametes are haploid
(b) Spores are invariably haploid
(c) Spores and gametes are invariably haploid
(d) Gametes are invariably haploid ✅
159. Embryo sac is called monosporic when it develops from
(a) All the four megaspores ✅
(b) Two megaspores
(c) One of the megaspores
(d) Three megaspores
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