Desert show maximum difference between day and night temperature.

Correct Option: C

Desert show maximum difference between day and night temperature.

Diffused porous wood have vessels irregularly arranged within the wood. In tropics, there is no sharp distinction between the seasons; hence, there is not much difference in the activity of cambium.

Correct Option: A

Diffused porous wood have vessels irregularly arranged within the wood. In tropics, there is no sharp distinction between the seasons; hence, there is not much difference in the activity of cambium.

Raphides are needle-shaped crystals of calcium carbonate or calcium oxalate found in specialized plant cells called idioblasts. It is believed that the raphides are a defense mechanism against plant predators, as they are likely to tear the soft tissues of the throat or esophagus of a plant predator chewing on the plant’s leaves. They are non-nitrogenous substances.

Correct Option: B

Raphides are needle-shaped crystals of calcium carbonate or calcium oxalate found in specialized plant cells called idioblasts. It is believed that the raphides are a defense mechanism against plant predators, as they are likely to tear the soft tissues of the throat or esophagus of a plant predator chewing on the plant’s leaves. They are non-nitrogenous substances.

Mimicry is resemblance of an organism to its natural surroundings, a non living object or another organism for concealing itself from its natural predators or preys.

Correct Option: A

Mimicry is resemblance of an organism to its natural surroundings, a non living object or another organism for concealing itself from its natural predators or preys.

Tropical rain forests occur in equatorial and subequatorial regions. The forests receive all the external inputs for optimum plant growth. Due to abundant plant growth, a large number of animals live in tropical rain forests. In grasslands fire occur periodically which prevent tree growth. In savannahs periods of drought are common. In deciduous forests are found predominantly broad leaved hard wood deciduous trees.

Correct Option: D

Tropical rain forests occur in equatorial and subequatorial regions. The forests receive all the external inputs for optimum plant growth. Due to abundant plant growth, a large number of animals live in tropical rain forests. In grasslands fire occur periodically which prevent tree growth. In savannahs periods of drought are common. In deciduous forests are found predominantly broad leaved hard wood deciduous trees.