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
Category: Biology Mcqs
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
Stem of Psilophyton an example of psilogsida is differentiated into an underground rhizome and an aerial part both of which are _________ branched?
A. Isotomous
B. Dichotomously
C. Trichotomously
D. Multichotomously
Masses of dilated tortuous veins in the anorectal mucosa are known as___________??
A. Bulimia
B. Ulcer
C. Adipose tissue
D. Hemorrhoids
Biological molecules (proteins) which catalyze a biochemical reaction and remain unchanged after completion of reaction are called_____________________??
A. Cofactor
B. Coenzymes
C. Activator
D. Enzymes
Which of the following statements is incorrect about skeletal muscle fibers??
A. They are multinucleated.
B. They are 10 – 100 ?m in diameter
Which one of these is an insect??
A. Mite
B. Spider
C. Moth
D. Scorpion
Deoxygenated blood first enters in _________ part in fishes??
A. Sinus venosus
B. Right atrium
C. Left atrium
D. Conus arteriosus
