NEET Practice Questions (MCQs) with Answers & Solutions

The NCERT states, 'Mitotic divisions in the meristematic tissues – the apical and the lateral cambium, result in a continuous growth of plants throughout their life.' This highlights the role of meristematic tissues in continuous plant growth through mitosis.

Mitosis is described as 'equational division' where 'the number of chromosomes in the parent and progeny cells is the same.' The reduction of chromosome number by half is characteristic of meiosis, not mitosis. Growth, genetic identity, and cell repair are all explicit significances of mitosis mentioned in the text.

The NCERT text specifies, 'A very significant contribution of mitosis is cell repair. The cells of the upper layer of the epidermis, cells of the lining of the gut, and blood cells are being constantly replaced.' This directly links the replacement of these cells to mitotic divisions.

The text explicitly states, 'Since the number of chromosomes in the parent and progeny cells is the same, it is also called as equational division.' This is the defining characteristic that gives mitosis its name 'equational division'.

The NCERT mentions an exception: 'However, there are few exceptions to this where haploid cells divide by mitosis, for example, male honey bees.' This provides a direct answer to the question.

The text states, 'Mitosis usually results in the production of diploid daughter cells with identical genetic complement.' This accurately describes the genetic outcome of mitosis.

The NCERT states, 'Mitotic divisions in the meristematic tissues – the apical and the lateral cambium, result in a continuous growth of plants throughout their life.' This highlights the specific tissues responsible for continuous growth.

The context clearly states, 'Cells in this stage remain metabolically active but no longer proliferate unless called on to do so depending on the requirement of the organism.' This defines the key characteristic of cells in $G_0$.

The NCERT text mentions, 'In animals, mitotic cell division is only seen in the diploid somatic cells.'

The text states, 'These cells that do not divide further exit G1 phase to enter an inactive stage called quiescent stage (G0) of the cell cycle.'