Agriculture - Online Test
Q1. Pollen grains are formed inside the
Answer : Option D
Explaination / Solution:
Pollen grains are formed inside the anther. Stamen contains filament and anther. Inside the anther microsporogenesis process takes place to produce haploid pollen grains that forms male gametes.
Q2. The physical expression or appearance of a character is called as
Answer : Option D
Explaination / Solution:
The physical appearance of a character is called as phenotype. The genetic make of individual is called genotype. Tallness, round, wrinkled, yellow etc. are physical appearance.
Q3. The complete combustion of glucose produces
Answer : Option C
Explaination / Solution:
The complete combustion of glucose, which produces carbon dioxide and water as end products, yields energy most of which is given out as heat.
Q4. Most of animals are unisexual but a few are bisexual too as
Answer : Option B
Explaination / Solution:
Most of animals possess either male or female reproductive organs, so unisexual except a few organisms like earthworm that contain both male and female reproductive parts in same individual.
Q5. Potato is a modified
Answer : Option C
Explaination / Solution:
Potato is a modified stem as it contain nodes in form of eyes on potato tubers which germinate to produce new potato plants if placed in suitable conditions.
Q6. A group of cells having a common origin and usually performinga common function is
Answer : Option C
Explaination / Solution:
A tissue is an ensemble of similar cells from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multiple tissues.
Q7. Measurement and the comparison of total growth per unit time is called
Answer : Option A
Explaination / Solution:
Absolute growth rate refers to the measurement and comparison of total growth per unit time.
Thus, Absolute growth = Growth in given time period.
Relative growth rate refers to the growth of a particular system per unit time, expressed on a common basis
Q8. Select the correct equation from the following
Answer : Option C
Explaination / Solution:
Diffusion pressure deficit is equal to osmotic pressure minus water potential. Higher the DPD more faster osmosis will occur.(DPD = OP – WP).
Q9. The cupric ions are essential for
Answer : Option C
Explaination / Solution:
Copper is absorbed as cupric ions (Cu2+).
It activates some enzymes in plants which are involved in lignin synthesis and it is essential in several enzyme systems. It is also required in the process of photosynthesis, is essential in plant respiration and assists in plant metabolism of carbohydrates and proteins.
Q10. The cell wall of green algae is made up of
Answer : Option C
Explaination / Solution:
Green algae usually have a rigid cell wall made of an inner layer of cellulose and an outer layer of pectose.
