Which of the following parameter of light is NOT required by plants to grow?
A.
Wavelength of light
B.
Intensity of light
C.
Duration of light
D.
Color of light
Answer: Option D
Explanation:
Light affects the process of growth in the plant like photosynthesis and reproduction. Wavelength and intensity of light play a major role in flower induction, plant movement, and seed germination and duration of light regulates flowering and fruiting.
Soil is the uppermost layer of the earth. The study of soil has been divided into two types, i.e., pedology and edaphology. Edaphology deals with the effect of soil on other living organisms.
Name the term which is used for the water present in the soil that can be utilized by the plants.
A.
Chresard
B.
Humus
C.
Gravitational water
D.
Capillary water
Answer: Option A
Explanation:
Chresard is the term given to the available water in the soil, which can be utilized by the plants. Water is basically present in the thin and narrow capillaries formed from the soil.
Vegetation of tropical deciduous forest falls under which of the following categories?
A.
Mesotherm
B.
Megatherm
C.
Microtherm
D.
Hekistotherm
Answer: Option A
Explanation:
On the basis of temperature range, the world’s vegetation has been divided into megatherm, mesotherm, microtherm, and hekistotherm. Vegetation under mesotherm experiences high and low temperature alternatively and found in a tropical deciduous forest.