A. Goldcrest B. Weebill C. Hummingbird D. None of these The average Ruby-Throated Hummingbird weighs about 3 grams which is roughly the same as a penny. The Bee Hummingbird of Cuba is the smallest bird in the world and only measures in at around 2 inches and 1.5 grams.
A. Mercury B. Earth C. Jupiter D. Uranus Jupiter is the largest planet in the Solar System. It is also known as winter planet as its average temperature is very low.
A. Elliptical B. Oblate Spheroid C. Oval D. Spherical Earth is an oblate spheroid. This means it is spherical in shape, but not perfectly round. It has a slightly greater radius at the Equator, the imaginary line running horizontally around the middle of the planet. In addition to bulging in the middle, Earth’s poles are … Read more
A. Sodium bicarbonate B. Calcium sulfate C. Calcium bicarbonate D. None of these Permanent hardness of water is due to the presence of Calcium sulfate. Permanent hardness is hardness (mineral content) that cannot be removed by boiling. When this is the case, it is usually caused by the presence of calcium sulfate and/or magnesium sulfates … Read more
A. Polynucleotide B. Polypeptide C. Oxyacetylene D. None of these A polypeptide is a single linear chain of many amino acids (any length), held together by amide bonds. A protein consists of one or more polypeptides (more than about 50 amino acids long). An oligopeptide consists of only a few amino acids (between two and … Read more
A. Oxygen B. Nitrogen C. Hydrogen D. Helium
A. Hydrogen B. Air C. Oxygen D. Argon Combustion can not take place without air. Air contains about 21% by volume of oxygen. Oxygen is essential for combustion to occur.
A. Eyes B. Throat C. Lungs D. Circulatory system Cataracts are the clouding of the lens of your eye, which is normally clear. Most cataracts develop slowly over time, causing symptoms such as blurry vision.
A. Sun B. A comet C. A meteor D. An steroid
A. DNA only B. DNA and RNA C. Proteins only D. DNA and Proteins