The deficiency of vitamin E causes _______ ?
The deficiency of vitamin E causes _______ ?A. Weak immune system
B. Weak bones
C. Lack of appetite
D. Sterility
B. Weak bones
C. Lack of appetite
D. Sterility
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The beautiful color patterns exhibited by a peacock in its tail feathers are due to ?
The beautiful color patterns exhibited by a peacock in its tail feathers are due to ?
A. Selective absorption of light
B. Selective re ection of light
C. Sinterference of light
D. Natural colour pattern of feathersWhat is the third most common gas found in the air we breathe ________ ?
What is the third most common gas found in the air we breathe ________ ?A. Hydrogen
B. Neon
C. Carbondioxide
D. Argon
The most common gas people breathe from clean air is nitrogen. Air is a mixture of gases, and the air on Earth contains about 78 percent nitrogen and about 21 percent oxygen. Argon, carbon dioxide neon, helium, methane, krypton, hydrogen and xenon are in much smaller amounts.The number of facial bones in a human body ________?
The number of facial bones in a human body ________?A. 15
B. 14
C. 22
D. 26Which of the following is used for hearing the sound of heart and lungs?
Which of the following is used for hearing the sound of heart and lungs?A. Steroscope
B. Stethoscope
C. Oscillator
D. OncolatorThe stethoscope is an instrument used for auscultation, or listening to sounds produced by the body. It is used primarily to listen to the lungs, heart, and intestinal tract. It is also used to listen to blood flow in peripheral vessels and the heart sounds of develog fetuses in pregnant women.
Television signals are converted into light signals by___________?
Television signals are converted into light signals by___________?
A. Optical fiber
B. Transistor
C. Decoder
D. Photo diode
E. None of theseThe element common to all acids is:__________?
The element common to all acids is:__________?A. Hydrogen
B. Carbon
C. Sulphur
D. Oxygen