Who is known as father of Biology
Answer: A
Aristotle is called the father of biology.
He was the first to observe and classify living things systematically, dissecting animals and describing their structure, habits and development, and his arrangement of the animal kingdom stood for nearly two thousand years.
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Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called
Answer: B
Skin darkens on exposure to sunlight because of melanin.
Ultraviolet light stimulates the melanocytes in the lower epidermis to make more of the pigment, which then absorbs UV and shields the cell nuclei from it. Tanning is therefore a protective response.
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Mumps is a disease caused by
Answer: C
Mumps is caused by a virus, a paramyxovirus spread in saliva and droplets.
It swells the parotid salivary glands, and in adults can inflame the testes, ovaries or pancreas. It is prevented by the MMR vaccine.
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Which one of the following plant is preferred for mixed cropping in order to enhance the bioavailability of nitrogen?
Answer: B
Gram is grown in mixed cropping to raise the availability of nitrogen.
Being a legume, it carries Rhizobium in root nodules that fix atmospheric nitrogen, some of which becomes available to the companion crop and the rest enriches the soil for the next.
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The outer membrane that covers the brain is
Answer: B
The outermost membrane covering the brain is the dura mater.
The three meninges are the tough fibrous dura outside, the web-like arachnoid beneath it, and the delicate pia mater following every fold of the brain. Cerebrospinal fluid circulates between the last two.
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Ordinary table salt is sodium chloride. What is baking soda?
Answer: D
Baking soda is sodium bicarbonate, NaHCO3.
Heated or acidified it gives off carbon dioxide, which is what raises a cake. Washing soda is the different compound sodium carbonate, and common salt is sodium chloride.
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The water readily available to plants for absorption by roots is
Answer: D
Capillary water is the form readily available to roots.
It is held in the fine pores between soil particles by surface tension, loosely enough for root hairs to draw it out. Gravitational water drains away too fast, and hygroscopic water is held so tightly to the particle surfaces that no root can take it.
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Largest flower found in the world is-
Answer: A
The largest flower in the world is Rafflesia arnoldii, of Sumatra and Borneo.
It reaches a metre across and weighs up to 11 kg. It is a parasite with no leaves, stem or roots of its own, and it smells of decaying flesh to attract the carrion flies that pollinate it.
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The universal donor belongs to blood group
Answer: D
Group O negative is the universal donor.
Its red cells carry neither the A nor the B antigen, so no recipient's antibodies attack them. Group AB is the universal recipient for the converse reason: its plasma has neither anti-A nor anti-B antibody.
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Nitrogenous Food is
Answer: A
Proteins are the nitrogenous foods.
They are built of amino acids, each containing an amino group, so protein is the body's source of nitrogen. Carbohydrates and lipids contain only carbon, hydrogen and oxygen.
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