Isotopes of an element have the same number of _______?
Isotopes of an element have the same number of _______?A. Neutrons
B. Protons
C. Electrons
D. Beta rays
B. Protons
C. Electrons
D. Beta rays
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The blueness of the sky is mainly due to _____________?
The blueness of the sky is mainly due to _____________?
A. The scattering of sunlight by air molecules
B. The presence of water vapor
C. Absorption of blue light by the air
D. Emission of blue light by the atmosphereA doctor who specializes in diseases of the nose?
A doctor who specializes in diseases of the nose?A. Rhinologist
B. Otologist
C. Pathologist
D. Podiatristdoctors who specialize in nose and sinus problems (rhinologists) treat people with nasal polyps, chronic sinusitis, skull base tumors and many other conditions.
The Carbon Dioxide in the atmosphere, by volume, is_______?
The Carbon Dioxide in the atmosphere, by volume, is_______?A. 0.039%
B. 3.9%
C. 13%
D. 30%Hydrogen peroxide (H2O2)______________?
Hydrogen peroxide (H2O2)______________?
A. helps line up cell proteins
B. is poisonous to tissues
C. is often needed as a catalyst
D. aids in oxidation of glucoseLignite, bituminous & anthracite are different rank of _________ ?
Lignite, bituminous & anthracite are different rank of _________ ?A. Iron
B. Coal
C. Wood
D. None of theseClassification of Animals and Plants on the basis on chromosome number is called________?
Classification of Animals and Plants on the basis on chromosome number is called________?A. Ecology
B. Taxonomy
C. Botany
D. None of these