Agriculture - Online Test
Q1. Two Synonyms are
Answer : Option C
Explaination / Solution:
Tricarboxylic acid cycle and citric acid cycle are two synonyms as both represent same cycle occurring during respiration process.
Q2. Guard cells of stomata are thicker
Answer : Option C
Explaination / Solution:
The cells surrounding the stomata are called guard cells. The guard cells of inner side are thicker and that of outer side is comparatively thinner.
Q3. The single cotyledon of cereal grain is
Answer : Option A
Explaination / Solution:
In monocotyledonous seeds single cotyledon is called as scutellum. It is found in cereal grains like rice, wheat, maize and other monocots.
Q4. A farmer grows cucumber plants in his field. He wants to increase the number of female flowers in them. Which plant hormones can be applied to achieve this?
Answer : Option D
Explaination / Solution:
Ethylene promotes female flowers in cucumbers thereby increasing the yield.
Q5.
Statement I: Asexual reproduction involves fusion of gametes.
Statement II: Asexually produced offspring are genetically identical.
Statement III: Asexual reproduction occurs in unfavorable condition only.
Answer : Option D
Explaination / Solution:
In asexual reproduction, fusion of gametes do not takes place and asexual reproduction occurs in favorable conditions. As fusion of gametes do not takes place, all the individuals are genetically identical to each other.
Q6. In diffusion, the movement of molecule across typical plant cell takes about
Answer : Option D
Explaination / Solution:
Long distance transport of substances within a plant cannot be by diffusion alone. Diffusion is a slow process. It can account for only short distance movement of molecules. For example, the movement of a molecule across a typical plant cell (about 50 μm) takes approximately 2.5 s.
Q7. The seeds dispersed by wind must not be
Answer : Option D
Explaination / Solution:
Dispersal of seed is necessary for proper growth of seed. The seeds located close to each other may have struggle for existence. The wind dispersed must be light, minute and winged so that it can be carried by wind easily. Sticky seeds remain attached with each other.
Q8. Dark brown amorphous substance formed by degradation of cellulose and lignin in the soil to increase water holding capacity and aeration is
Answer : Option A
Explaination / Solution:
Dark brown amorphous substance formed by degradation of cellulose and lignin in the soil to increase water holding capacity and aeration is humus. It also increase fertility of the soil.
Q9. Which plant has fungal association in the form of mycorrhiza?
Answer : Option C
Explaination / Solution:
Roots in some genera of gymnosperms have fungal association in the form of mycorrhiza(Pinus).
Q10. Carbon dioxide is fixed in
Answer : Option B
Explaination / Solution:
Photosynthesis occurs in two steps- light reaction and dark reaction. During light reaction ATP and NADPH molecules are formed and in dark reaction carbon dioxide is fixed.
