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Dlhi Puble Sehoot Megacity. Rolkata Pre-Boards Examination 2022-23 Subject: Biology Class: X Duration: 2 hours Maximum Marks: 80 Ansuwers to the questions must be written on the paper provided separately. You will not be allowed to write during the first 15 minutes. This time is to be spent in reading the Question paper. The time at the head of the paper is the time allotted for writing the answers. Section A is compulsory. Attempt any four questions from Sectlon B. are given in brackets | | The intended marks for questions SECTION-A (40 marks) [Answer all the questions from this section Question 1 Select the correct answers to the questions from the given options. [Only write the correct question number and the corresponding alphabet to the answer [lx15-15] (4) On which day of the menstrual cycle does ovulation take place (a) 2nd day 4c) 14th day (b) 4th day (d) 28th day (4i) Which of the following is secreted by anterior lobe of pituitary gland? a) Somatotropin (c) Vasopressin (b) Ptyalin (d) Insulin (1ti) The main component of white matter of brain and spinal cord is: (b) Axon (a) Cyton (c) Schwann cell (d) Dendrite (iv) The fuid present in the anterior part of the eye infront of the lens: (a) Aqueous humour (b) Ciliary body (c) Vitreous humour (d) Cornea (v) In Mendelian cross, F1 generation is formed by: (a) Self pollination (b) Cross pollination (d) None of the above (c) Hybridization (vi) When water is lost in the form of droplets from the end of veins it is called: (a Transpiration (c) Evaporation (b) Condensation (d) Guttation 1
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