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.

Study the diagram given below and answer the questions that follow: (a) Name the phenomenon depicted by the shoot in the above diagram. (b) Which plant hormone plays an important role in the above movement? (c) Complete and rewrite the given statement by filling in the correct terms: Shoots show positive ............... whereas, roots show positive ............... .

Sunil tried to match the tropic movements in plants with the stimulus they respond to. Tropism Stimulus P Thigmotropism Touch Q Geotropism Water R Chemotropism Chemicals S Phototropism Gravity Identify the correct pair: (a) P and R (b) Q and S (c) R and S (d) P and S

Assertion (A): Abscisic acid promotes stomatal closure during a drought. Reason (R): Abscisic acid helps the plant to conserve water during stress. (a) (A) is true and (R) is false (b) (A) is false and (R) is true (c) Both (A) and (R) are true and (R) is the correct explanation of (A). (d) Both (A) and (R) are true and (R) is not the correct explanation of (A).

Name the following: (a) Unicellular outgrowths of the epidermis of roots. (b) The defect of the eye in which some parts of an object are focused while other parts appear blurred. (c) The tropic movement in response to chemicals. (d) The main nitrogenous waste in the human body. (e) The attachment of the fertilized ovum to the wall of the uterus.

Choose the odd one out from the following terms and name the category to which the others belong: (a) Auxin, Oxytocin, Gibberellin, Cytokinin (b) Growth Hormone, Vasopressin, Thyroid Stimulating Hormone, Gonadotropic Hormone (c) Urochrome, Urea, Uric acid, Nucleic acid (d) Cervix, Chordae Tendinea, Papillary Muscles, Sinoatrial node (e) Morula, Blastocyst, Oviduct, Foetus

Give the biological/technical terms for the following: (a) The tropic movement wherein the tendrils of a pea plant twine around a support. (b) A defect in our eye in which some parts of the object are in focus while the other parts are blurred. (c) The type of waste generated in hospitals and pathological laboratories. (d) The surgical technique for females that can be used to prevent pregnancy. (e) The evolutionary process by which new species arise from the existing one.

Ali has some pea plants in his garden which need a support to grow as seen in the picture given below: (a) Name the phenomenon depicted by the shoot in the given figure. (b) Define the above phenomenon. (c) Write the name of the part marked X.

Differentiate between the functions of Urethra and Uterus.

Rachna is an expert gymnast on the balance beam. She has been vigorously practising for the Olympic Games. Lately, she has been experiencing dizziness and losing her balance during the practice sessions. (a) Which part of the membranous labyrinth is responsible for maintaining the body balance on the beam? (b) Which type of balance is maintained by the structure mentioned in (a)? [Space for diagram]

Give any two characteristic features of a Cro-Magnon man.

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