Tag: concept of life

Growth is defined as a permanent or irreversible increase in thy weight, size, mass or volume of a cell, organ or organism.

Auxanometer are simple instruments that measure growth, as increase in axis length, which includes both increase in protoplasm mass as well as expansion, due to water absorption.

Classical experiments on growth were performed by Boysen - Jennsen and Darwin. The existence of first plant growth hormone came from the work of Darwin. They found that bending movement of coleoptile of canary grass was due to exposure of tip to unilateral light. Boysen - Jennsen found that the tip produces a chemical which was later named auxin. Darwin's findings on plants have been published as a book in the name of 'The power of movements in plants.

Eduard Adolf Strasburger was a Polish - German professor who has one of the most famous botanists of the 19th century. He had contributed a lot towards the field of botany. He explained about the distribution of growth in a root by marking it at equal intervals with Indian ink.

Plants respond to their environment to ensure their survival. Plants response to environment is mainly through growth, either towards or away from stimuli. This type of response is called as tropism. It is brought about by hormones, which control plant growth and development.

Growth occurs when the anabolic (Constructive activities) exceed the catabolic activities (destructive activities).

The irreversible permanent increase in size, volume or weight of the body is called Growth. It is the cumulative effect of cell division, cell elongation and cell differentiation. During growth, in the cells, rate of metabolism is high. So, synthesis and breakdown of biomolecules takes place. In this synthesis of biomolecules is higher than breakdown of biomolecules. So the rate of anabolism is greater than catabolism.

So, correct option is ‘Anabolism is higher than catabolism’.

The irreversible permanent increase in size, volume or weight of the body is called Growth. During synthesis of protoplasmic and non protoplasmic substances takes place. Synthesis of the protoplasmic substances is called protoplasmic growth and synthesis of non protoplasmic  substances(cell wall) is called apoplasmic growth.

So, the correct option is ‘Protoplasmic and apoplasmic’

Increase in the size of an organ or body is called growth, whereas the formation of progeny from a parent is called reproduction. So in a living organism growth and reproduction simultaneously occur.

So, the correct answer is ‘Mutually inclusive events ’.

Primary growth is the increase in the length of root and shoot. It is the result of cell division of apical meristem.