Agriculture - Online Test
Q1. The characteristic feature of which cells have lignified thickening at the corner?
Answer : Option C
Explaination / Solution:
Sclerenchyma consists of long, narrow cells with thick and lignified cell walls having a few or numerous pits.
Q2. Maximum growth occurs in
Answer : Option A
Explaination / Solution:
In growth curve, maximum growth occurs in exponential phase of sigmoid curve. During this periods cells divide mitotically to increase length and girth of the plant.
Q3. The instrument used for measuring rate of transpiration is
Answer : Option D
Explaination / Solution:
Potometer is used for measuring rate of transpiration in plant. Loss of water in form of water vapour is called transpiration.
Repeated question
Q4. Element involved in the synthesis of cell wall and storage material are called
Answer : Option D
Explaination / Solution:
Those minerals that are involve in the synthesis of cell wall and storage material are called framework element. Calcium, Magnesium, Carbon includes framework elements.
Q5. Largest unicellular organism is
Answer : Option A
Explaination / Solution:
Acetabularia is a genus of green algae, specially of Polyphysaceae family. It is the largest unicellular organism.
Q6. The portion of ATPase enzyme that protrudes on outer surface of the thylakoid membrane on the side faces of the stroma
Answer : Option D
Explaination / Solution:
The ATPase enzyme consists of two parts: one called the is embedded in the membrane and forms a transmembrane channel that carries out facilitated diffusion of protons across the membrane. The other portion is called and protrudes on the outer surface of the thylakoid membrane on the side that faces the stroma.
Q7. The inner most wall layer of microsporangium is called as
Answer : Option D
Explaination / Solution:
Microsporangium is covered by a number of layers. The outer layer or integuments surround the tepetum. The tepetum provide nutrients to growing microspores that leads to pollen grains.
Q8. Which of the following is an example of co-dominance?
Answer : Option A
Explaination / Solution:
Co-dominance is the phenomenon that deviates from Mendel’s law of inheritance. Both the alleles appear in offspring instead of one as in Mendel’s experiment. ABO blood grouping in human being is example of co-dominance in which both IA and IB appear simultaneously to form AB blood type.
Q9. The partial breakdown of glucose takes place in
Answer : Option B
Explaination / Solution:
Fermentation is an anaerobic breakdown of carbohydrates in which an organic molecule is the final electron acceptor. It does not involve an electron transport system.
Furthermore,: it is a partial breakdown of glucose giving a little energy, 2 net ATP's per glucose by way of substrate-level phosphorylation.
Q10. Parthenogenesis is the development of unfertilized ovum into a fully formed haploid organism. Natural parthenogenesis is found in
Answer : Option C
Explaination / Solution:
Development of individual from unfertilized ovum is called parthenogenesis. The individual is haploid as no fusion of gametes occurs. Honey bee is of three kinds namely queen, drone and worker. Workers are produced parthenogenetically.
