Which of the following transmits nerve impulse from receptors to central nervous system??
A. Sensory neuron
B. Motor neuron
C. Associative neuron
D. none of these.
Category: Biology Mcqs
PS I has chlorophyll a molecule which absorbs maximum light of _________ nm ??
A. 600
B. 650
C. 680
D. 700
Which of the following statement about Homeostasis is incorrect??
A. There is a definite control system that regulates the homeostatic activities
B. Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment
C. Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment
D. All are correct
Which of the following has no central nervous system??
A. Hydra
B. Man
C. Planaria
D. Cockroach
Strong chlorosis is due to the deficiency of _____________ in plants??
A. Magnesium
B. Nitrogen
C. Potassium
D. Phosphorus
Cuticular transpiration is _________ of total transpiration??
A. 6-8%
B. 5-7%
C. 7-9%
D. 4-6%
Aerating openings formed in the bark through which exchange of gases takes place and water is lost in the form of vapours are___________??
A. Hydathods
B. Stomata
C. Lenticels
D. None of these
Lime stone deposits are formed from__________??
A. Zooflagellates
B. Foraminferans
C. Aetinopods
D. Apicomplexans
Visible light used in photosynthesis ranges from:__________??
A. 300 – 700 nm in wavelength
B. 350 – 750 nm in wavelength
C. 380 – 750 nm in wavelength
D. 390 – 790 nm in wavelength.
Which disease has been totally eradicated from the world because of effective vaccination??
A. Measles
B. Polio
C. Small pox
D. Hepatitis
