Homeostasis — Biology MCQs (Class 12)
Free chapter-wise Biology MCQs with answers for MDCAT, FSc and entry tests.
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#1 The ability of an organism to maintain its internal environment constant is called
A) Homeostasis
B) Osmoregulation
C) Thermoregulation
D) Excretion
#2 Organs or structure in a body that can detect changes in the body conditions are
A) Sensors
B) Receptors
C) Effectors
D) Both A and B
#3 Any change in the environment that produces a response in an organism is called
A) Antigen
B) Effector
C) Stimulus
D) Sensor
#4 The ability of an organism to tolerate dehydration is called
A) Hydrobiosis
B) Anhydrobiosis
C) Homeostasis
D) Xerophytism
#5 Osmoconformers have their solute conc.
A) Isotonic to external solution
B) Hypertonic to external solution
C) Hypotonic to external solution
D) Both A and B
#6 Birds are
A) Uricotelic
B) Ureotelic
C) Ammonotelic
D) Both A and B
#7 The following are the breakdown produces of hemoglobin
A) Urchrome
B) Bilirubin
C) Cholesterol
D) Iron
#8 The break down process of amino acids is called
A) Ammonification
B) Deamination
C) Nitrification
D) Denitrification
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