Biology MCQs
Biology MCQs Test Preparation | Latest 2025 Quiz FPSC, NTS, KPPSC, PPSC, SPSC, BPSC, OTS, UTS, PTS, CTS, ATS, ETEA MCQs Test Questions.
Bats & humming birds belong to___________?
A: Endotherms
B: Ectotherms
C: Heterotherms
D: Homeotherms
Heterotherms
Thick, waxy & leathery cuticle around leaves is present in___________?
A: Hydrophytes
B: Mesophytes
C: Xerophytes
D: Halophytes
Xerophytes
Which of the following animal excrete nitrogenous waste mainly as uric acid?
A: Hydra
B: Planaria.
C: Humans
D: Birds.
Birds.
Which of the following openings have cilia?
A: Nephrostome
B: Nephridiopore
C: Both of these
D: None of these
Nephrostome
In osmosis water molecules move from area of _____________ through semipermeable memberane?
A: Higher solute concentration to lower solute concentration
B: Lower solute concentration to higher solute concentration
C: Lower solvent concentration to higher solvent concentration
D: All of these
Lower solute concentration to higher solute concentration
In Urea cycle __________ ammonia molecules combine with 1 CO2 molecule to form 1 molecule of urea.
A: 1
B: 2
C: 3
D: 4
2
Which adaptation is acquired by plants of cooler areas to prevent lipid crystal formation in cell membrane?
A: Change in membrane protein composition.
B: Change in the solute composition of the cell membrane which prevents crystallization.
C: Increase in proportion of unsaturated fatty acids.
D: Development of heat shock proteins.
Increase in proportion of unsaturated fatty acids.
Which of the following statement about Homeostasis is incorrect?
A: There is a definite control system that regulates the homeostatic activities
B: Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment
C: Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment
D: All are correct
Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment
Which of the following fish drink large amount of sea water and excrete concentrated urine resulting in maximum salt excretion and minimal water loss?
A: Hagfish
B: Fresh water fishes
C: Bony fishes
D: None of these
Bony fishes