Different growth phases result in a

Which of the following statements are correct regarding the conditions necessary for plant growth?
i. Microelements and macroelements are required for the proper growth of the plant.
ii. For proper growth of plant,optimum temperature ranges between $15^{\circ} C-25^{\circ} C$.
iii. In the absence of oxygen,the process of respiration and release of energy takes place in all plants.
iv. Gravitational force decides the direction of growth of the shoot and root.
v. Light is essential for the germination of some seeds and photosynthesis.

Describe briefly:
$(a)$ Arithmetic growth
$(b)$ Geometric growth
$(c)$ Sigmoid growth curve
$(d)$ Absolute and relative growth rates

In geometric growth,the total number of cells produced after four successive mitotic divisions will be . . . . . .

In which of the following is thigmotropic movement best observed?

The given graph of length versus time shows a linear curve for which type of growth?