Embibe Experts Solutions for Chapter: Continuity of Life, Exercise 1: West Bengal Board-2018

During the meiosis cell division, reduction in the number of chromosomes and exchange of segments between chromatids take place analyse what are the significance of these two phenomena.

Distinguish between asexual and sexual reproduction on the basis of following features:

i) Number of parents

ii) Nature of offspring

 How can you distinguish between mitosis of plant cells and that of animal cells on the basis of formation of spindle fibre and the process of cytokinesis?

Establish the relationship between the formation of malignant tumour in the human body with the loss of control in the cell cycle?

‘The adventitious leaf bud plays significant role in natural vegetative propagation of plant’ – Evaluate the validity of the statement with a proper example?

Write three features of the metaphase stage and two features of the anaphase stage of mitotic cell division in an animal cell.

Distinguish between mitotic and meiotic cell division in animals on the basis of the following features:

• Site of occurrence
• Nature of division of chromosomes
• Number of cells produced

List the changes in the sense organs and bones that occurred during the senescence phase of human development.

Explain the importance of the following parts of a eukaryotic chromosome:

• Centromere
• Telomere

Analyse the role of cell divisions in controlling growth, reproduction and repair in an organism.