Biology MCQs
Biology MCQs Test Preparation | Latest 2025 Quiz FPSC, NTS, KPPSC, PPSC, SPSC, BPSC, OTS, UTS, PTS, CTS, ATS, ETEA MCQs Test Questions.
Which of the following represents osmoregulatory steps taken by hydrophytes?
A: Increases transpiration by increasing the surface area of the leav
B: Small and thick leaves to decrease the surface area proportional to the volume of the leav
C: Stomata closing in sufficient supply, and opening in restricted supply of water.
D: None of these
Increases transpiration by increasing the surface area of the leav
Most of the marine invertebrates are__________?
A: Osmoconformers
B: Osmoregulators
C: Both depend upon the concentration of sea water
D: None of these
Osmoconformers
Which of the following marine fishes are considered direct descendents of fresh water ancestors?
A: Hagfish
B: Jelly Fish
C: Star Fish
D: Bony fishes
Bony fishes
Low level of CO2 favours _________ of the stomata.
A: Opening
B: Closure
C: Both of these
D: None of these
Opening
Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper.
A: Bacteria
B: Viruses
C: Fungi
D: Cyanobacteria
Fungi
Addition of salts and other solutes from other cells into xylem sap, __________ the water potential of the xylem sap
A: Increases.
B: Lowers.
C: Doesnt effect.
D: Maintains.
Lowers.
Stomata open due to _________ of K+ into the guard cells from the surrounding epidermis
A: Diffusion
B: Active transport
C: Osmosis
D: All of these
Active transport
Which of the following is true about hearts of earthworm?
A: There are 5-7 pairs of heart.
B: They are present between 1-7th segments.
C: They are present lateral to the oesophagus.
D: They pump blood from ventral to dorsal vessel.
They are present lateral to the oesophagus.
95% of the cytoplasm of red blood cells is the___________?
A: Antibodies
B: Hemoglobin
C: Enzymes
D: Proteins
Hemoglobin