Biology MCQs
Biology MCQs Test Preparation | Latest 2025 Quiz FPSC, NTS, KPPSC, PPSC, SPSC, BPSC, OTS, UTS, PTS, CTS, ATS, ETEA MCQs Test Questions.
In animals excess of nitrogen is excreted primarily in form of___________?
A: Creatinine
B: Trimethyamine oxide
C: Pyrimidine
D: Ammonia
Ammonia
Hydra has no specialized excretory system because:
A: It does not produce waste material
B: Due to absence of mesoderm
C: The whole body cells are in contact with water
D: It has pseudocoelom.
The whole body cells are in contact with water
The distal blind end of the malpighian tubules bathes freely in____________?
A: Digestive tract
B: Intestines
C: Haemocoel
D: Coelom
Haemocoel
Which excretory product in produced in plants during autotrophic mode of life?
A: CO2
B: H2O
C: O2
D: Both A and B
O2
It has been estimated that in a normal person plasma constitutes about ________ by volume of blood.
A: 35%
B: 45%
C: 55%
D: 75%
55%
Brown fat present in certain mammals is specialized in___________?
A: Providing insulation in cold environment.
B: Providing insulation in hot environment
C: Rapid heat production.
D: Controlling heat production.
Rapid heat production.
Panting is a representative of which mechanism?
A: Pigmentation.
B: Respiration.
C: Evaporative cooling.
D: Excretion.
Evaporative cooling.
Formation of heat shock proteins in plants results in___________?
A: Elevation of temperature in cold conditions.
B: Embracing the enzymes and other proteins and prevent their denaturation.
C: Change the chemical nature of other proteins thus making them heat resistant.
D: Help in evaporative cooling.
Embracing the enzymes and other proteins and prevent their denaturation.
Fishes, most of the invertebrates and amphibians are examples of ________ animals?
A: Endotherms
B: Ectotherms
C: Heterotherms
D: Homeotherms
Ectotherms
The mechanism of regulation, generally between organism and its environment, of solutes and the gain and the loss of water is called________?
A: Homeostasis
B: Hemostasis
C: Osmoregualtion
D: Thermoregulation
Osmoregualtion