Agriculture - Online Test
Q1.
Identify the cytokinin given below.
Answer : Option B
Explaination / Solution:
Cytokinin is of different types. The cytokinin shown above is of kinetin which promotes cell division. It was isolated by Miller and Skoog from autoclaved herring sperm DNA.
Q2. Which of the following organism produce gemmules as asexual reproductive structure?
Answer : Option C
Explaination / Solution:
Gemmules are asexual reproductive structure produced by sponges. Chlamydomonas produce zoospores, hydra produce buds and Penicillium produces conidia.
Q3. Bulk flow can be achieved by
Answer : Option C
Explaination / Solution:
Bulk flow can be achieved either through a positive hydrostatic pressure gradient (e.g., a garden hose) or a negative hydrostatic pressure gradient (e.g., suction through a straw).
Q4. Assertion: The portion of embryonal axis above the level of cotyledon is epicotyl.
Reason: Epicotyl terminates at with lower end in the radicle or root tips.
Reason: Epicotyl terminates at with lower end in the radicle or root tips.
Answer : Option B
Explaination / Solution:
In embryo, the portion of embryonical axis above the level of cotyledon is epicotyl which terminates with Plumule or stem tips above the above the level of cotyledons,
Q5. Grey spots of Oat are due to deficiency of
Answer : Option C
Explaination / Solution:
Manganese deficiency in Oat appear as grey spots on leaves of oat. Rate of photosynthesis is also influenced by the Manganese elements.
Q6. The megasporangium of naked seed plants are called
Answer : Option B
Explaination / Solution:
The cones bearing megasporophylls with ovules or megasporangia are called macrosporangiate or female strobili.
Q7. The first product of photosynthesis is sugar and it is converted
Answer : Option A
Explaination / Solution:
Photosynthesis is the process by which plants, some bacteria and some protistans use the energy from sunlight to produce glucose from carbon dioxide and water. The glucose is used in respiration, or converted into starch and stored.
Q8. Haploid chromosome number is 12. What is the number in monosomic?
Answer : Option D
Explaination / Solution:
Monosomic is an aneuploidy in which a chromosome is deficient of its homologous causing genetic imbalance resulting in weaker than normal form. In normal form(2n) 24 chromosome should be present but 1 homologous pair is absent so, only 23 chromosome will be present in monosomic individual.
Q9. In mitochondria, protein accumulate in
Answer : Option B
Explaination / Solution:
In mitochondria, protein accumulate in intermembrane space between two layers of mitochondria.
Q10. The wall of fruit is called
Answer : Option A
Explaination / Solution:
Fruits are the mature ovary or ovaries of one or more flowers. In fleshy fruits, the outer layer (which is often edible) is the pericarp, which is the tissue that develops from the ovary wall of the flower and surrounds the seeds.
