1. In which of the following plant species can self-pollination never occur either naturally or artificially?
(a) Zea mays
(b) Gossypium hirsutum
(c) Carica papaya ✅
(d) Saccharum officinarum
2. What will happen if several fruitlets (seeds) of a developing strawberry are removed at random?
(a) Seedless fruit will be formed
(b) Fruit will not develop at all
(c) Normal fruit with less seeds is formed
(d) A disturbed fruit with underdeveloped portions is formed ✅
3. In angiosperms, the egg is
(a) Completely surrounded by a wall
(b) Surrounded by a wall only at the micropylar end
(c) Surrounded by a wall only at the chalazal end
(d) Devoid of wall ✅
4. The main advantage of vegetative propagation is that it
(a) Is quite easy
(b) Is reliable
(c) Produces genetically uniform progeny ✅
(d) Produces healthy, disease-resistant plants
5. Dichogamy refers to
(a) Male and female sex organs maturing at the same time
(b) Male and female sex organs maturing at different times ✅
(c) Anthers are sterile whereas ovules are fertile
(d) Ovules are sterile whereas anthers are fertile
6. The first step in hybridization is
(a) Emasculation ✅
(b) Pollination
(c) Bagging
(d) Tagging
7. The process of removal of stamens from bisexual flowers before they dehisce is called
(a) Pollination
(b) Emasculation ✅
(c) Bagging
(d) Hybridization
8. The process of covering the emasculated flowers with butter paper bags is known as
(a) Emasculation
(b) Bagging ✅
(c) Pollination
(d) Crossing
9. The function of tagging in hybridization is
(a) To avoid contamination
(b) To protect from insects
(c) To record the date and details of crossing
(d) To identify the crosses and maintain proper records ✅
10. Emasculation is not required in
(a) Cross-pollinated crops
(b) Self-incompatible crops
(c) Male sterile lines
(d) Both (b) and (c) ✅
%20(2).png)
0 Comments