Biology MCQs

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Abscisic Acid plays the most important role in establishing dormancy in seeds. Abscisic Acid has also been found to be present in metazoans, from sponges up to mammals including humans.

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All the species listed are water-dwelling creatures. However, a fundamental difference is that fish belong to the group of vertebrates, meaning their body possesses a spinal column. In contrast, crabs, prawns, and snails are invertebrates, denoting that they lack a backbone. Specifically, crabs and prawns are crustaceans, within the larger class of invertebrates, characterised by their exoskeleton and segmented bodies. Snails are grouped as molluscs, also a class of invertebrates, known for their soft unsegmented body. Hence, in this context, fish are different from the others.

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Lac is the scarlet resinous secretion from insects. It is secreted by a number of a number of species of lac insects, of which the most commonly cultivated is Kerria lacca. The farmer gets a stick that contains eggs ready to hatch and ties it to the tree to be infested.

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Albumin is most abundant in eggs. Albumin is a family of globular proteins are water-soluble, moderately soluble in concentrated salt solutions, and experience heat denaturation. Substances which contain albumins are called albuminoids.

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Bionics or biologically inspired engineering is the application of biological methods combined with engineering. It is that branches of science which studies the functions, characteristics, and phenomena observed in the living world and the application of this knowledge to world of machine.

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Cobalt is a component of Vitamin B12. Vitamin B12 is also known as also known as cobalamin, is an important water-soluble vitamin which is used in the production of red blood cells and DNA.

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Respiratory roots are found in aquatic plants and plants which grow on marshy areas. In mangroves the roots are not getting sufficient oxygen and hence they grow upwards from the ground.

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The hormonal activities of Gibberellin were discovered while studying “foolish seedling” disease in rice. Gibberellins (GAs) are plant hormones. They regulate various developmental processes in plants.

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Reptiles and Amphibians have a mixed heart.

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Stigma of the plant is used in making the saffron spices. In making the saffron spice, stigma of the plant is used. Stigma is the top of the centre part of a flower. It receives the pollen that allows it to form new seeds.