Ozone depletion occurs commonly due to_______________?
A. Carbon dioxide
B. Chlorofluorocarbons
C. UV rays
D. Deforestation
Ozone depletion occurs commonly due to_______________? Read More »
Biology McqsDeoxygenated blood first enters in _________ part in fishes?
A. Sinus venosus
B. Right atrium
C. Left atrium
D. Conus arteriosus
Deoxygenated blood first enters in _________ part in fishes? Read More »
Biology McqsAccording to cohesion-tension theory, tension is created by__________________?
A. Hydrogen bonding
B. Transpiration
C. Adhesion
D. Root prerssure
According to cohesion-tension theory, tension is created by__________________? Read More »
Biology McqsCuticular transpiration is _____________ of total transpiration?
A. 1-2%
B. 3-4%
C. 5-7%
D. 90%
Cuticular transpiration is _____________ of total transpiration? Read More »
Biology McqsAn infectious disorder of respiratory system is_________________?
A. Cancer
B. Asthma
C. Tuberculosis
D. Emphysema
An infectious disorder of respiratory system is_________________? Read More »
Biology Mcqs_________________ cells of phloem are directly involved in transport of organic solutes?
A. Parenchyma
B. Companion cell
C. Tracheid
D. Sieve element
_________________ cells of phloem are directly involved in transport of organic solutes? Read More »
Biology Mcqs95% of the cytoplasm of RBCs is____________?
A. Hemoglobin
B. Enzymes
C. Salts
D. Other proteins
95% of the cytoplasm of RBCs is____________? Read More »
Biology McqsAn antibody is made of _________ polypeptide chains?
A. 1
B. 2
C. 3
D. 4
An antibody is made of _________ polypeptide chains? Read More »
Biology Mcqs______________ of earth surface is covered with water?
A. 10%
B. 30%
C. 75%
D. 90%
______________ of earth surface is covered with water? Read More »
Biology McqsGaseous exchange in birds occurs at level of_______________?
A. Alveoli
B. Air sacs
C. Bronchi
D. Parabronchi
Gaseous exchange in birds occurs at level of_______________? Read More »
Biology Mcqs