MCQ
Growth of a shoot or a root involves:
- ACell enlargement
- BCell division
- CCell differentiation
- DAll the above
Explanation:
Growth is an irreversible increase in the size.There are three developmental stages of growth of all plant parts including shoot and root.These are cell division, cell enlargement and cell differentiation.Cell division is the first phase that results in increase in the number of cells. In plants, karyokinesis, division of nucleus is followed by cytokinesis, the division of the cytoplasm.Cell enlargement gives the proper size to the organ and tissue.During this, protoplasm, vacuole, etc are formed.Cell differentiation is seen at cell level, tissue level, organ level and at the level of an organism.The cells differentiate to form different types of tissues that later perform different but specific functions.
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$(a)$ It help overcome the apical dominance
$(b)$ Delay senescence, Thus the fruits can be left on the tree longer so as
$(c)$ Increase in length of axis
$(d)$ It is used to speed up the maltingprocess in brewing industries
$(e)$ It induces parthenocarpy
$(f)$ Promotes female flowers in cucumbers