Question

Describe briefly.

(a) Arithmetic growth

(b) Geometric growth

(c) Sigmoid growth curve

(d) Absolute and relative growth rates

Answer 1

Growth - It is a characteristic of living beings in which an irreversible permanent increase in the size of an organ or its parts occurs or an increase in the size of a cell.

Types of Growth Rate :

Growth rate can be defined as the increase in growth per unit time.

Plants show two types of growth—Arithmetic and Geometric—according to the increase shown by the growth rate.

Arithmetic growth - Only one daughter cell continues to divide while others differentiate or mature. For example, root elongating at a constant rate.

Geometric growth - Initial growth is slow (lag phase), followed by a rapid increase in growth (log/exponential phase), and followed by a phase where growth slows down (stationary phase). For example, all cells, tissues and organs show this type of growth