1861. The productivity of aquatic ecosystem is basically determined by light and____________?
✅ D. Nutrients
Option A: CO2 Option B: O2 Option C: Water Option D: Nutrients Correct Answer : Nutrients Read more
Biology MCQs – Page 94
1862. The first layer of cell wall which is formed is___________?
✅ A. Primary wall
Option A: Primary wall Option B: Secondary wall Option C: Middle lamella Option D: All of these Correct Answer : Primary wall Read more
1863. Annual rainfall in grassland is about_____________?
✅ C. 250-750 mm
Option A: More than 2500 mm Option B: 750-1500 mm Option C: 250-750 mm Option D: Less than 250 mm Correct Answer : 250-750 mm Read more
1864. 95% of the cytoplasm of RBCs is____________?
✅ A. Hemoglobin
Option A: Hemoglobin Option B: Enzymes Option C: Salts Option D: Other proteins Correct Answer : Hemoglobin Read more
1865. _________________ cells of phloem are directly involved in transport of organic solutes?
✅ D. Sieve element
Option A: Parenchyma Option B: Companion cell Option C: Tracheid Option D: Sieve element Correct Answer : Sieve element Read more
1866. An infectious disorder of respiratory system is_________________?
✅ C. Tuberculosis
Option A: Cancer Option B: Asthma Option C: Tuberculosis Option D: Emphysema Correct Answer : Tuberculosis Read more
1867. Cuticular transpiration is _____________ of total transpiration?
✅ C. 5-7%
Option A: 1-2% Option B: 3-4% Option C: 5-7% Option D: 90% Correct Answer : 5-7% Read more
1868. According to cohesion-tension theory, tension is created by__________________?
✅ B. Transpiration
Option A: Hydrogen bonding Option B: Transpiration Option C: Adhesion Option D: Root prerssure Correct Answer : Transpiration Read more
1869. Deoxygenated blood first enters in _________ part in fishes?
✅ A. Sinus venosus
Option A: Sinus venosus Option B: Right atrium Option C: Left atrium Option D: Conus arteriosus Correct Answer : Sinus venosus Read more
1870. Ozone depletion occurs commonly due to_______________?
✅ B. Chlorofluorocarbons
Option A: Carbon dioxide Option B: Chlorofluorocarbons Option C: UV rays Option D: Deforestation Correct Answer : Chlorofluorocarbons Read more
1871. Who coined the term CELL?
✅ C. Robert Hook
Option A: Schwann Option B: Schleiden Option C: Robert Hook Option D: Both a and b Correct Answer : Robert Hook Read more
1872. lubb sound is produced due to___________________?
✅ B. Closure of inlet valve
Option A: Opening of inlet valve Option B: Closure of inlet valve Option C: Opening of outlet valve Option D: Closure of outlet valve Correct Answer : Closure of inlet valve Read more
1873. In condition of high temperature, following does not occur or occurs at low level__________?
✅ C. Thermogenesis
Option A: Vasodilation Option B: Activation of sweat glands Option C: Thermogenesis Option D: Evaporative cooling Correct Answer : Thermogenesis Read more
1874. ______________ of earth surface is covered with water?
✅ C. 75%
Option A: 10% Option B: 30% Option C: 75% Option D: 90% Correct Answer : 75% Read more
1875. An antibody is made of _________ polypeptide chains?
✅ D. 4
Option A: 1 Option B: 2 Option C: 3 Option D: 4 Correct Answer : 4 Read more
1876. Enterobius vermicularis is commonly known as____________?
✅ B. Pinworm
Option A: Flatworm Option B: Pinworm Option C: Hook worm Option D: Tapeworm Correct Answer : Pinworm Read more
1877. Red to orange pigments are_____________?
✅ A. Carotenes
Option A: Carotenes Option B: Carotenoids Option C: Xanthophylls Option D: Chlorophyll Correct Answer : Carotenes Read more
1878. Destruction of all life forms is called___________?
✅ A. Sterilization
Option A: Sterilization Option B: Disinfection Option C: Antisepsis Option D: Preservation Correct Answer : Sterilization Read more
1879. Animals of which class of arthropoda are present everywhere_____________?
✅ B. Insecta
Option A: Crustacean Option B: Insecta Option C: Arachnida Option D: Myriapoda Correct Answer : Insecta Read more
1880. Pox viruses are_________?
✅ D. DNA enveloped
Option A: RNA non-enveloped Option B: RNA enveloped Option C: DNA non-enveloped Option D: DNA enveloped Correct Answer : DNA enveloped Read more