Which substance impregnates the secondary cell wall of sclerenchyma cells?
Correct answer C. Lignin
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Biology MCQs
Page 28 of Biology multiple-choice questions with answers. Tap an option to check yourself.
Page 28 of 75
Which hormone is mainly responsible for bone weakening in older women?
Correct answer D. Oestrogen
In which joint are the muscles arranged in the same plane as the joint itself?
Correct answer D. Between femur and tibia
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What maintains high turgor pressure in a plant cell?
Correct answer D. Both B and C
At certain points, the fibrous capsule around a synovial joint becomes thickened. What do these thickenings form?
Correct answer A. Ligaments
The immovable joint between the two parietal bones of the skull is an example of which kind of joint?
Correct answer C. Fibrous joints
What mainly provides support to the young herbaceous parts of a plant?
Correct answer D. All of these
What type of joint is formed where the humerus meets the radius and ulna?
Correct answer C. Freely movable joint
Across which opening are the vocal cords stretched?
Correct answer C. Glottis
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How many air sacs are found in most birds?
Correct answer D. 9
Parabronchi in the lungs of birds are open at how many ends?
Correct answer A. Both
Respiratory distress syndrome is especially common in babies born at what stage of pregnancy?
Correct answer A. Less than 7 months
What is gas exchange through the skin called?
Correct answer B. Cutaneous
Which of these airways does NOT contain cartilage?
Correct answer B. Bronchioles
Which structure is also known as the voice box?
Correct answer C. Larynx
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What gives the external ear its shape?
Correct answer C. Elastic cartilage
On which side of the heart does blood enter?
Correct answer B. Posterior
Damage to which cranial nerve could cause a defect in eye movement?
Correct answer A. Abducens
Which animals have lungs through which air flows in one direction only, so that the air is renewed after each breath?
Correct answer A. Aves
How many spiracles are open in an insect when its abdomen expands?
Correct answer C. 8