Purine and pyrimidine metabolism results in production of____________?
A. Creatinine
B. Trimethyamine oxide
C. Xanthine
D. None of these
Purine and pyrimidine metabolism results in production of____________? Read More »
Biology McqsWhich of the following statement about conifers is correct?
A. Stored excretory products in vacuoles, at a concentration that leads to crystal formation.
B. Accumulate waste in leaves, which fall in autumn.
C. Production of black wood in the center.
D. Excrete some of the waste materials directly into soil, occasionally using them as a chemical weapon against other competing plants.
Which of the following statement about conifers is correct? Read More »
Biology McqsWhich excretory product in produced in plants during autotrophic mode of life?
A. CO2
B. H2O
C. O2
D. Both A and B
Which excretory product in produced in plants during autotrophic mode of life? Read More »
Biology McqsWhich of the following marine fishes are considered direct descendents of fresh water ancestors?
A. Hagfish
B. Jelly Fish
C. Star Fish
D. Bony fishes
Most of the marine invertebrates are__________?
A. Osmoconformers
B. Osmoregulators
C. Both depend upon the concentration of sea water
D. None of these
Most of the marine invertebrates are__________? Read More »
Biology McqsWhich of the following represents osmoregulatory steps taken by hydrophytes?
A. Increases transpiration by increasing the surface area of the leave.
B. Small and thick leaves to decrease the surface area proportional to the volume of the leave.
C. Stomata closing in sufficient supply, and opening in restricted supply of water.
D. None of these
Which of the following represents osmoregulatory steps taken by hydrophytes? Read More »
Biology McqsThe 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
Fishes, most of the invertebrates and amphibians are examples of ________ animals?
A. Endotherms
B. Ectotherms
C. Heterotherms
D. Homeotherms
Fishes, most of the invertebrates and amphibians are examples of ________ animals? Read More »
Biology McqsFormation 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.
Formation of heat shock proteins in plants results in___________? Read More »
Biology McqsPanting is a representative of which mechanism?
A. Pigmentation.
B. Respiration.
C. Evaporative cooling.
D. Excretion.
Panting is a representative of which mechanism? Read More »
Biology Mcqs