Agriculture - Online Test
Q1. Largest bird is
Answer : Option C
Explaination / Solution:
Ostrich is a large sized bird. It is not able to fly long distance. The egg of ostrich is considered largest cell which is about one meter in diameter.
Q2. Rhizophora possess
Answer : Option B
Explaination / Solution:
An aerial root that arises form a stem or trunk, penetrates the soil and help supports the plant. Prop root is found in Rhizophora plant.
Q3. The parenchymatous cells which lie between the xylem and the phloem are called
Answer : Option B
Explaination / Solution:
Conjunctive tissue is a narrow strip of tissue ( parenchyma or sclerenchyma) that lies between xylem and phloem bundles of root.
Q4. The correct sequence leading to the growth curve
Answer : Option B
Explaination / Solution:
The initial growth is slow (lag phase), and it increases rapidly thereafter – at an exponential rate (log or exponential phase). Here, both the progeny cells following mitotic cell division retain the ability to divide and continue to do so. However, with limited nutrient supply, the growth slows down leading to a stationary phase.
Q5. Diffusion rate is affected by
Answer : Option B
Explaination / Solution:
Diffusion rates are affected by the gradient of concentration, the permeability of the membrane separating them, temperature and pressure.
Q6. The elements involved in delay of flowering if their concentration is low are
Answer : Option D
Explaination / Solution:
Deficiency of N, K, S and Mo causes stunted growth because of inhibition of cell division. Deficiency of N, S and Mo delays flowering.
Q7. Angiosperm: roots :: Phaeophyceae:
Answer : Option B
Explaination / Solution:
The plant body of phaeophyceae is usually attached to the substratum by a holdfast whereas the angiosperms attach to the substratum with the help of roots.
Q8. Photosynthesis is maximum in
Answer : Option C
Explaination / Solution:
There is maximum absorption by chlorophyll a, in the red region and so there is higher rate of photosynthesis.
Q9. The Gynoecium of flower having two or more carpel fuse together are called
Answer : Option D
Explaination / Solution:
Gynoecium is the female reproductive part of flower. It consists of single or more than two carpel( pistil). When these carpels are fused together, they are called syncarpous.
Q10. Material used for conducting experiments on genetic traits by Mendel was
Answer : Option B
Explaination / Solution:
Mendel conduct his hybridization experiment on garden pea (Pisumsativum) using different contrasting pair of traits.
