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).

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.

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.

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.

Ramesh is a farmer who has a vineyard and cultivates grapes. To improve the shape of the grapes and make them elongated he sprays a particular phytohormone at the time of fruiting. (a) Name the phytohormone that Ramesh sprays on the plant at the time of fruiting. (b) These grapes are said to be seedless. What is the technical term for the formation of such fruits?

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.

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

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 ............... .

Assertion (A): Deficiency of Antidiuretic hormone causes an increase in urination. Reason (R): Antidiuretic hormone acts on the kidney to reabsorb water from the kidney tubules. (a) A is True and R is False (b) A is False and R is True (c) Both A and R are True (d) Both A and R are False

Assertion (A): Seminal vesicles pour an alkaline secretion into the semen as it passes through the ureter. Reason (R): The female vagina is acidic and needs to be neutralized for sperm survival. (a) A is True and R is False (b) A is False and R is True (c) Both A and R are True (d) Both A and R are False

A scientist wanted to conduct a genetic experiment on mice. He cut the tails of all the mice and made them reproduce. What will be the phenotype of the offsprings? (a) All the offsprings will be tailless. (b) There will be a mix of tailed and tailless offsprings. (c) All the offsprings will have tails. (d) Tail of the offsprings cannot be predicted.

Assertion (A): A turgid plant cell is in a balanced state. Reason (R): In a turgid cell, turgor pressure and wall pressure are equal and in the same direction. (a) A is True and R is False (b) A is False and R is True (c) Both A and R are True (d) Both A and R are False