Agriculture - Online Test
Q1. XO type of sex determination is found in
Answer : Option C
Explaination / Solution:
In grasshopper, sex determination is of XO type, in which the males have only one X-chromosome besides the autosomes whereas females have a pair of X-chromosome.
Q2. Net gain of ATP molecules per hexose during aerobic respiration is
Answer : Option D
Explaination / Solution:
Each glucose (hexose) during complete oxidation or aerobic respiration produce net 36 ATP molecules, which is produced in form of NADPH and FADH. Each NADPH produce 3 ATP and FADH two ATP molecules.
Q3. Function of guard cell in stomata is to
Answer : Option B
Explaination / Solution:
Opening and closing of stomatal pore of stomata is the function of guard cells. Change in osmotic potential cause the opening and closing of stomata.
Q4. Ethylene is a
Answer : Option C
Explaination / Solution:
Ethylene is a simple gaseous hormone. It is synthesised in large amounts by tissues undergoing senescence and ripening fruits.
Q5. Identify the correct one with respect to the symmetry of flower.
Answer : Option D
Explaination / Solution:
When a flower is divided into two equal radial halves in any radial plane passing through the centre, it is said to be actinomorphic. e.g., mustard, datura, chilli.
Q6. The pathway of water passes from root hairs to xylem through the walls of intervening cells without crossing any membrane or cytoplasm is called
Answer : Option B
Explaination / Solution:
The apoplast is the system of adjacent cell walls that is continuous throughout the plant, except at the casparian strips of the endodermis in the roots.
Q7. In which of the following plants fruit contain larger number of seed
Answer : Option C
Explaination / Solution:
The number of ovule present in ovary determine the number of seeds produced inside the fruit. Mango and neem produce single seed in each fruit. Lemon contain a number of seeds but orchid contain many small size seeds.
Q8. Main function of Nickel (Ni2+) in leaves and root is
Answer : Option B
Explaination / Solution:
Main function of Nickel ions in leaves and root is metabolism of urea and ureides to form amino acids and protein in plant body.
Q9. Asexual reproduction is common in
Answer : Option D
Explaination / Solution:
Asexual reproduction is common in Protists and Monera. Both these kinds include organisms having single celled body. Binary and multiple fissions are generally followed for asexual mode of reproduction.
Q10. The sporophytes bearing sporangia having leaf-like appendages are called
Answer : Option B
Explaination / Solution:
The sporophytes bear sporangia that are subtended by leaf-like appendages called sporophylls.
