Agriculture - Online Test
Q1. Hydroponics refers to growing plant in
Answer : Option A
Explaination / Solution:
Hydroponics is a subset of hydroculture, the method of growing plants without soil, using mineral nutrient solutions in a water solvent.
Q2. Select the wrong pair of vegetative propoagules from the following pairs?
Answer : Option B
Explaination / Solution:
The wrong pair of vegetative propoagules is rhizome-potato. Potato is grown vegetatively by eyes present on underground modified tubers. Vegetative propagation is a mode of asexual reproduction.
Q3. In pathway, the bundle sheath cells are lack of an enzyme called
Answer : Option B
Explaination / Solution:
The released in the bundle sheath cells enters the or the Calvin pathway, a pathway common to all plants. The bundle sheath cells are rich in an enzyme Ribulose bisphosphate carboxylase-oxygenase (RuBisCO), but lack PEPcase.
Q4. Liverworts are closely related to
Answer : Option D
Explaination / Solution:
The bryophytes are divided into liverworts and mosses so they closely related to each other.
Q5. Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized, the F2 segregation will show:
Answer : Option B
Explaination / Solution:
Two genes located very close on the chromosomal linkage map. Segregation of R and Y will not takes place due to linkage and passes to same gamete together but overall segregation can be expected as usual as dihybrid cross, 9:3:3:1.
Q6. Dough kept overnight in warm place becomes soft and spongy due to
Answer : Option C
Explaination / Solution:
Fermentation is a kind of anaerobic respiration in absence of oxygen to produce ethanol and carbon dioxide gas. Dough kept overnight in warm place becomes soft and spongy due to carbon dioxide gas released during fermentation.
Q7. In angiosperms, main water and mineral transporting elements is
Answer : Option C
Explaination / Solution:
In angiosperms, the main water and mineral transporting element is tracheids. Vessels also transport water and mineral in angiosperms.
Q8. Antiauxin used in picking cotton bolls is
Answer : Option C
Explaination / Solution:
TIBA (2,3,5 Triidobenzoic acid) acts as antiauxin that inhibit root and shoot formation. TIBA is used as antiauxin in picking cotton bolls.
Q9. The form of thalamus in which ovary is at top and stamens, petals and sepals are borne below is called
Answer : Option A
Explaination / Solution:
In the hypogynousflower, thegynoecium occupies the highest position while the other parts are situatedbelow it. The ovary in such flowers is said to be superior.
Q10. Main function of lenticel is
Answer : Option C
Explaination / Solution:
Lenticels are minute pore in stems through which exchange of gases takes place between plant and atmosphere.
