Differentiate between Mitosis in plant cell and animal cell based on Cytokinesis.

Differentiate between Karyokinesis and Cytokinesis.

Read the explanations given below and name the structures: (a) The canal through which the testes descend down into the scrotum just before the birth of a male baby. (b) The part of the brain that regulates the peristaltic movement of the alimentary canal. (c) A structure that collects the soundwaves and conducts them through the external auditory canal. (d) The point of attachment of two chromatids of a chromosome. (e) Regulation of the opening and closing of stomata.

The diagram given below represents a stage in mitosis. (a) Identify the stage given above. (b) Give one reason to support your answer in (a). (c) Mention the number of chromosomes given in the diagram.

Expand the abbreviation — DNA.

Name the following: (i) The organelle that forms the aster during cell division. (ii) A genetic disorder in which the blood does not clot. (iii) The permanent stoppage of menstruation in human females around the age of 45 years. (iv) The openings on the barks of trees through which transpiration occurs. (v) A gaseous plant hormone which promotes ripening of fruits.

During the synthesis phase of the cell cycle, more of: (a) RNA is synthesised (b) RNA and proteins are synthesised (c) DNA is synthesised (d) Glucose is synthesized

Choose the odd one out from the following terms and name the category to which the others belong: (a) Used bandages, Pesticides, Face masks, Syringes. (b) Dust, Smoke, Carbon monoxide, Effluents (c) Uterus, Urethra, Urinary bladder, Ureter (d) Menstrual phase, Telophase, Follicular phase, Luteal phase (e) Malleus, Incus, Cochlea, Stapes

Haploid number of chromosomes are found in: (a) Nephrons (b) Neurons (c) Skin cells (d) Sperms

Mention the two pairs of nitrogenous bases that are present in a DNA strand and pair with each other by hydrogen bonds.

Mention the number of Autosomes and Allosomes in a human body cell.

Duplicated chromosomes are joined at a point termed: (a) Centrosome (b) Centromere (c) Centriole (d) Chromatid