Agriculture - Online Test
Q1. The meiocyte of an onion plant contains 32 chromosomes. Calculate the number of chromosomes found in its endosperm
Answer : Option C
Explaination / Solution:
The meiocyte cell are diploid so, haploid cell will contain 16 chromosomes. The endosperm cell are formed by fusion of two polar nuclei and one male gametes so, endosperm cells are triploid that will contain 16x3= 48 chromosomes.
Q2. They are compound or mixture of chemicals which are added to the soil in order to overcome deficiency of minerals
Answer : Option C
Explaination / Solution:
Fertilizers are compound or mixture of chemicals which are added to the soil in order to overcome deficiency of minerals. Fertilizers are added to restore the nutrient deficiency.
Q3. Which one is a peat moss?
Answer : Option D
Explaination / Solution:
Sphagnum is also known as peat moss as it provide peat that have long been used as fuel.
Q4. The process of synthesis of ATP from ADP in the presence of light are
Answer : Option B
Explaination / Solution:
The process of which ATP is synthesised by cells (in mitochondria and chloroplasts) is named phosphorylation. Photophosphorylation is the synthesis of ATP fromADP and inorganic phosphate in the presenceof light.
Q5. The phenomenon of having more than two sets of chromosome is called
Answer : Option A
Explaination / Solution:
Polyploidy is the phenomenon of having more than two genomes or sets of chromosomes in the nucleus of cell of an organism. It may be triploid, tetraploid etc. polyploidy with odd number of genomes are sexually sterile.
Q6. In electron transport system, the oxidation of one molecule of NADH produces
Answer : Option B
Explaination / Solution:
Oxidation of one molecule of NADH gives rise to 3 molecules of ATP, while that of one molecule of produces 2 molecules of ATP.
Q7. Which one of the following has the highest number of species in nature?
Answer : Option D
Explaination / Solution:
Insects have the highest number of species in nature. Insect belongs to arthropods family of class Mammalia. They are charecterised by jointed legs.
Q8. Monocotyledonous leaves are
Answer : Option B
Explaination / Solution:
Monocotyledonous leaves are isobilateral as both the lower and upper sides of the leaves are the same.
Q9. Auxins are mostly produced in
Answer : Option C
Explaination / Solution:
Auxins are generally produced in growing apices of shoot and root. These two regions are the meristematic cells which are actively taken part in cell division.
Q10. Corm is a modification of
Answer : Option D
Explaination / Solution:
Corm is an organ of perenation and vegetative propagation consisting of a short erect fleshy swollen underground stem. It store food material.
