Question

define; growth ,differentiation ,development ,De differentiation ,Re differentiation determinate growth ,Meristem and growth rate

Answer 1

a) growth: growth is permanent and Irreversible increase in the form of mass of an organism

b) differentiation: cells derived from root apical and shoot apical Meristem and cambium differentiate and mature to perform specific functions it is termed as the differentiation

c) development :it includes all changes that an organism goes through during its life cycle from seed germination to the stage of senescence

d)De differentiation :leaving differentiated cells have lost capacity to divide main region capacity of division under certain conditions and it is called the dedifference
eg; interfascicular cambium and cork

e) Re differentiation: Meristem are unable to produce cells that once again the capacity to divide but mature to specific functions it is called Redifferentia

f) determinate growth: it is open in plants it occurs in such a certain region

g) Meristem : it is located at root and tips the Meristem refers to the cells remain dividing

h)growth rate :increased growth unit time is known as growth rate

#$bebrainly$

Answer 2

Answer:

(a) Growth

It is an irreversible and permanent process, accomplished by an increase in the size of an organ or organ parts or even of an individual cell.

(b) Differentiation

It is a process in which the cells derived from the apical meristem (root and shoot apex) and the cambium undergo structural changes in the cell wall and the protoplasm, becoming mature to perform specific functions.

(c) Development

It refers to the various changes occurring in an organism during its life cycle – from the germination of seeds to senescence.

(d) De-differentiation

It is the process in which permanent plant cells regain the power to divide under certain conditions.

(e) Re-differentiation

It is the process in which de-differentiated cells become mature again and lose their capacity to divide.

(f) Determinate growth

It refers to limited growth. For example, animals and plant leaves stop growing after having reached maturity.

(g) Meristem

In plants, growth is restricted to specialised regions where active cell divisions take place. Such a region is called meristem. There are three types of meristems – apical meristem, lateral meristem, and intercalary meristem.

(h) Growth rate

It can be defined as the increased growth in plants per unit time.