Biology MCQs

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Inflammation of the lungs, accumulation of mucus in alveoli, and fever are characteristics of pneumonia in animals.

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Compound manure is made of Rotted vegetables and animal refuse. A fertilizer that contains two or more nutrients and is also known as a multi-nutrient fertilizer is called Compound manure.

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Blue-Green algae are Symbiotic Nitrogen-Fixing Cyanobacteria. Liverworts, cycad roots, fern, and lichens are also some of the Nitrogen-fixing cyanobacteria.

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Brinjal is the first GM crop in India. Genetically modified crops are plants used in agriculture and the DNA of which has been modified using genetic engineering methods.

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The Bacillus Calmette–Guérin (BCG) vaccine is used to prevent tuberculosis (TB). The BCG vaccine is named after Dr Albert Calmette and Dr Camille Guerin, who developed the vaccine from a germ called Mycobacterium bovis, which is similar to TB. BCG is a live vaccine that has been processed so that it is not harmful to humans. Tuberculosis is an infectious disease caused by bacteria that affects the lungs, and sometimes other parts of the body.

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In the frog, Mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa, while the posterior region remains as functional kidney and transports urinary wastes to the exterior.

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Chameleons have specialized cells, chromatophores, which contain pigments in their cytoplasm, in three layers below their transparent outer skin. Dispersion of the pigment granules in the chromatophores sets the intensity of each color. Chromatophores contain pigments and reflect light, which are responsible for creating coloration. In chameleons, there are four types of chromatophores: xanthophores, erythrophores, iridiophores, and melanophores (Cooper and Greenberg, 1992).

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Skeletal muscle is a form of striated muscle which is under the voluntary control of the somatic nervous system. Most skeletal muscles are attached to bones by bundles of collagen fibres known as tendons. It is one of three major muscle types, the others being cardiac muscle and smooth muscle.

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Animals that have a cavity between body wall and digestive tract are known as coelomates for e.g.. annelids, molluscs, arthropods, Echinodermata, and chordates etc. In contrast, animals in which the body cavity is absent are known as acoelomates. Platyhelminthes is an example of acoelomates. The presence or absence of body cavity or coelom plays a very important role in the classification of animals.

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Guard cells interact physiologically and mechanically with subsidiary cells. Guard cells are those which have chloroplasts and control the opening of stomata. But, subsidiary cells are those which support the guard cells and they do not have chloroplasts.