Agriculture - Online Test
Q1. Non-motile spores produced exogenously by constriction at the tips of special hyphae are called as
Answer : Option C
Explaination / Solution:
The plant body of fungi is called mycelium. A small portion of mycelium is called hyphae. Asexual reproduction in fungi occurs by development of constriction at the tips of hyphae called conidiophores.
Q2. In which type of solution, the living cell is placed in figure given below
Answer : Option D
Explaination / Solution:
If the external solution is more concentrated, it is hypertonic. Cells shrink in hypertonic.
Q3. Embryonal axis has the radicle and root cap enclosed in an undifferentiated sheath is known as
Answer : Option B
Explaination / Solution:
In monocotyledonous seeds embryonal axis has undifferentiated sheath that covers radicle and root cap is called coleorhiza.
Q4. Mineral absorption into the plant is always against the concentration gradient and use ATP as source of energy, it is an/ a
Answer : Option D
Explaination / Solution:
Mineral absorption into the plant is always against the concentration gradient and use ATP molecules as source of energy is an active process. As concentration of minerals are always higher in cell than soil.
Q5. A moss plant used as a fuel are
Answer : Option A
Explaination / Solution:
Species of Sphagnum, a moss, provide peat that have long been used as fuel.
Q6. Calvin cycle is discovered by
Answer : Option C
Explaination / Solution:
The work of Melvin Calvin is the discovery, the first CO2 fixation product was a 3-carbon organic acid. He also contributed to working out the complete biosynthetic pathway; hence it was called Calvin cycle.
Q7. In humans, height shows a lot of variation. It is an example of
Answer : Option D
Explaination / Solution:
Height of human being is not controlled by single pair of gene. A number of genes participate to form growth hormone that actually triggers the height of individual.
Q8. In eukaryotic organisms aerobic respiration takes place in presence of
Answer : Option C
Explaination / Solution:
Aerobic means “with air”. This type of respiration needs oxygen for it to occur so it is called aerobic respiration.
The word equation for aerobic respiration is:
Glucose + Oxygen Carbon dioxide + Water + Energy
The chemical equation is:
C6H12O6 + 6O2 6CO2 + 6H2O + 2900 kJ/mol
Q9. Inflorescence which shows indefinite growth and bears a number of flowers due to active growing point is called
Answer : Option D
Explaination / Solution:
In recemose inflorescence indefinite growth occurs and bears a number of flowers due to active growing point.
Q10. Aerating pores in the bark of plants is known as
Answer : Option B
Explaination / Solution:
In plants respiratory organs in stem is called lenticels. They are located as pores in the bark of plants.
