Biology MCQs
Biology MCQs Test Preparation | Latest 2025 Quiz FPSC, NTS, KPPSC, PPSC, SPSC, BPSC, OTS, UTS, PTS, CTS, ATS, ETEA MCQs Test Questions.
The productivity of aquatic ecosystem is basically determined by light and____________?
A: CO2
B: O2
C: Water
D: Nutrients
Nutrients
The first layer of cell wall which is formed is___________?
A: Primary wall
B: Secondary wall
C: Middle lamella
D: All of these
Primary wall
Annual rainfall in grassland is about_____________?
A: More than 2500 mm
B: 750-1500 mm
C: 250-750 mm
D: Less than 250 mm
250-750 mm
95% of the cytoplasm of RBCs is____________?
A: Hemoglobin
B: Enzymes
C: Salts
D: Other proteins
Hemoglobin
_________________ cells of phloem are directly involved in transport of organic solutes?
A: Parenchyma
B: Companion cell
C: Tracheid
D: Sieve element
Sieve element
An infectious disorder of respiratory system is_________________?
A: Cancer
B: Asthma
C: Tuberculosis
D: Emphysema
Tuberculosis
According to cohesion-tension theory, tension is created by__________________?
A: Hydrogen bonding
B: Transpiration
C: Adhesion
D: Root prerssure
Transpiration
Deoxygenated blood first enters in _________ part in fishes?
A: Sinus venosus
B: Right atrium
C: Left atrium
D: Conus arteriosus
Sinus venosus
Ozone depletion occurs commonly due to_______________?
A: Carbon dioxide
B: Chlorofluorocarbons
C: UV rays
D: Deforestation
Chlorofluorocarbons