Gaseous Exchange MCQch10,11,12l

Student’s Name:____________Admission No.______Roll No._____Section:______
Paper: Biology      Class: 10                      Time Allowed:    20 mins                          Marks: 12 

Checked by:_______________ Rechecked by:_____________ Sign Invigilator:_____________

Q1. Circle the correct answer.  (12)

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

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