Biology MCQs
Biology MCQs Test Preparation | Latest 2025 Quiz FPSC, NTS, KPPSC, PPSC, SPSC, BPSC, OTS, UTS, PTS, CTS, ATS, ETEA MCQs Test Questions.
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
Which of the vascular channels are related to Juxtramedullary nephrous only?
A: Afferent and efferent arterioles
B: Peritubualr capillaries
C: Vasa nervosa
D: Vasa recta
Vasa recta
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
In a hot summer after noon, if your bodys Homeostatic machinery keep your internal temperature quite lower than that of external than this is an example of____________?
A: Positive feed back
B: Negative feed back
C: Feed back
D: Osmoregulation
Negative feed back
Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.
A: Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment
B: Trimethyl alanine
C: Ammonia
D: Trimethylamine oxide
Trimethylamine oxide