Mohan is fond of playing basketball. His concentration is on shooting the ball into the opponent’s basket as given in the picture. (a) Which part of the brain helps Mohan to concentrate in putting the ball into the basket? (b) Name the sense organ that helps to gauge the distance between the ball and the basket. (c) Name the part of the brain that co-ordinates all the voluntary muscles of his body.

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.

Arrange the following in a logical sequence: (a) Australopithecus, Cro-Magnon, Homo erectus, Neanderthal man. (b) Pupil, Aqueous humour, Retina, Vitreous humour. (c) Effector, Receptor, Motor neuron, Sensory neuron. (d) Loop of Henle, Distal convoluted tubule, Bowman’s Capsule, Proximal convoluted tubule. (e) Water vapour, Soil water, Leaves, Ascent of Sap.

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.

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.

Distinguish between Semicircular canals and Utriculus based on their function.

Name the following: (a) The fully developed part of the ovary containing a mature ovum. (b) A waxy layer on the upper epidermis of leaves meant to reduce Transpiration. (c) The ear ossicle which opens into the oval window of Cochlea. (d) The physiological process which is the starting point of all food chains. (e) An insect which is a classic example of natural selection due to industrial melanism.

Which ear ossicle transports sound from the tympanum to the inner ear? (a) Stapes (b) Malleus (c) Incus (d) Cochlea

Which parts of the ear are responsible for: (a) Static equilibrium? (b) Dynamic equilibrium?

Which part of the eye adjusts the focal length of the eye lens? (a) Cornea (b) Iris (c) Ciliary muscles (d) Sclera

Tara's grandmother is 70 years old and has a passion for embroidery. She faces difficulty in threading the needle as the eye of the needle appears blurred. The ophthalmologist diagnosed it as an age-related disorder. (a) Name the defect. (b) How can it be corrected? (c) Where is the image formed in this defect?

Rajat Singh was working as a supervisor in a stone quarry where rock, sand and gravel are extracted by techniques like digging, drilling and blasting. As the years rolled by, Rajat started facing a loss in hearing. The high decibel sounds had damaged a part of his internal ear, though the tympanic membrane was intact. (a) What is the collective term for the structures of the internal ear? (b) Name the sensory organ in the cochlea that was damaged. (c) Name the type of pollution responsible for this condition.