Biology 10Chapter No.10

Gaseous Exchange MCQch10,11,12e

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Paper: Biology      Class: 10                      Time Allowed:    One Hour                           Marks: 25 

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Q1. Circle the correct answer.  (12)

1.Secretion of rubber plant is called?
a) gums      b) mucilage      c) latex      d) resins
2.Normal human breathing rate is?
a) 12 – 15 times per minute    b) 15 – 20 times per minute   c) 16 – 20 times per minute  d) 18 – 20 times per minute
3.Which fibers conduct impulse away from cell body?
a) dendrites      b) neuron      c) nerve      d) axons
4.The smallest bone of human body is_______
a) stapes      b) incus      c) malleus      d) vertebra
5.Pea shaped gland attached to hypothalamus is:
a) Adrenal gland        b) Parathyroid      c) Pituitary       d) Thyroid
6.Where does the gaseous exchange occur in humans?
a) Pharynx       b) Trachea       c) Bronchi      d) Alveoli
7.To carry urine from the kidney to the bladder is a function of?
a) ureter      b) urethra      c) a & b      d) none od these
8.The primary chemical stemulus for breathing in the concentration of ____ in blood?
a) carbon dioxide      b) oxygen      c) nitrogen      d) hydrogen
9.Dust particle in inspired air is?
a) Variable      b) Saturated      c) Both a & b      d) None of them
10.Cones are sensitive to__________
a) White light      b) Bright light      c) Dim light      d) None of them
11.Which mineral is required for the production of Thyroxin?
a) Cl       b) F       c) Br       d) I
12.Some xerophytes plants store water in _____________ cells?
a) Sclerenchyma       b) Parenchyma       c) Root      d) None of them