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O Level Biology Practice Test 3

Stomata and Functions Quiz Answers PDF - 3

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Biology Quiz Online: Stomata & Functions MCQs PDF Download - 3

MCQ: Guard cells of stoma are

A) irregular in shape
B) convex in shape
C) long and cylindrical in shape
D) kidney-shaped

MCQ: Special kind of protein containing iron is called as

A) hormones
B) hemoglobin
C) fibrinogen
D) globulins

MCQ: In the cardiac system, systole means

A) a "lub" sound
B) ventricular relaxation
C) closure of semilunar valves
D) a "dub" sound

MCQ: The pH of succus entericus is

A) below 7
B) neutral
C) above 7
D) depending upon the type of food to be digested

MCQ: Pulmonary veins carry

A) red oxygenated blood
B) bluish red deoxygenated blood
C) deoxygenated blood from heart to the lungs
D) oxygenated blood from lungs to heart

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