Biology MCQs

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Each kidney is made of tube like structures called nephrons (renal tubules). A nephron is the structural and functional unit of the kidney. The cup-shaped upper end called Bowman’s capsule, has a network of capillaries within it called glomerulus. Glomerulus is a knot of capillaries formed from the artery which brings blood containing wastes and excess of water to the kidney. Bowman’s capsule leads into a tubular structure.

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Vitamin E is called ant sterility vitamin. Vitamin E, a fat soluble vitamin, is found naturally in some foods, added to others, and available as a dietary supplement.

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Blue component in light causes suppression of melatonin produced by the pineal gland. Melatonin regulates the sleep–wake cycle. Natural levels of melatonin in the blood are highest at night.

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Rafflesia is a genus of parasitic flowering plants in the family Rafflesiaceae. It is the plant with largest flowers and found in many parts of the South East Asia.

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Human can listen only the frequencies below 20 kHz. However animals like dogs, cats, dolphins, bats, and mice can listen above this limit. This principle was used by Galton who produced the ultrasonic waves by blowing a whistle. For human these whistle appears silent, while dogs and cats can listen it. It is used in training of dogs and cats

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Restriction in blood supply due to factors in the blood vessels refers to Ischemia. Ischemia can have causes that aren’t due to underlying disease some of which include extreme exercise, cold exposure or tourniquet.

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Either RNA or DNA is found in a Bacteriophage. A bacteriophage which is also informally known as a phage, is a virus that infects and replicates within bacteria and archaea.

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The set Milliped, Crab, Centipede, Cockroach is correctly paired in Taxonomy, referring to the classification of these animals in their biological taxonomy. All belong to Arthropoda, the invertebrate group characterized by an exoskeleton, a segmented body, and jointed appendages. They hold a vast diversity of forms and have more species than any other animal phyla.

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Alzheimer's is caused by brain cell death. It is a neurodegenerative disease, which means there is progressive brain cell death that happens over a course of time. It is caused due to deficiency of acetylcholine.

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The coconut water from tender coconut that we are familiar with, is nothing but free nuclear endosperm (made up of thousands of nuclei) and the surrounding white kernel is the cellular endosperm. In the most common types of endosperm development, the Primary Endosperm Nucleus (PEN) undergoes successive.