21.
An increase in temperature results an increase in the rate of diffusion. This is because an increase in temperature causes

22.
In cold-requiring plants, the ripeness-to-flower stage is reached when

23.
Match List-I (part before fertilisation) with List-II (part after fertilisation) and select the correct answer:
List-I List-II
a. Ovary 1. Paricarp of fruit
b. Ovary wall 2. Fruit
c. Ovule 3. Seed
d. Egg cell 4. Embryo

26.
According to which of the following hypotheses, the endergonic formation of ATP is accomplished via a coupling factor that transfers electron energy promoted by photosynthesis or respiration?

29.
In which of the following pelagic zones, darkness is virtually complete except for bioluminescence, and where temperature is low and pressure is great?

30.
The only palms of the Indus plain are