Biology MCQs

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A goitre which is also called a bronchoce is a swelling in the neck. It is commonly developed as a result of iodine deficiency or the inflammation of the thyroid gland.

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Twins are two offspring produced by the same pregnancy. Twins can be either monozygotic (‘identical’), meaning that they develop from one zygote, which splits and forms two embryos, or dizygotic (‘fraternal’), meaning that each twin develops from a separate egg and each egg is fertilized by its own sperm cell.

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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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Biologists have been able to demonstrate the hearing and sound sensory mechanism through the acoustico-lateralis system in fishes.

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Overdose of antibiotics will cause the suppression of synthesis biotin in human body. Biotin is also known as vitamin H, vitamin B₇ or vitamin B₈ and is involved in a wide range of metabolic processes, primarily related to the utilization of fats, carbohydrates, and amino acids.

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The Coral Reef ecosystem showcases the highest biodiversity among the options provided. This is due to the ideal tropical environment in which they exist, offering a wide range of habitats, shelter, and nourishment for an astonishing array of marine life. In terms of biodiversity, they are second only to tropical rainforests. Interestingly, despite covering less than 1% of the ocean floor, coral reefs support about 25% of all known marine species.

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Charles Robert Darwin gave the theory of evolution in his book “The Origin of Species”. The theory proposed by him is known as “The Theory of Natural Selection”.

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Test tube baby is a term that refers to a child that is conceived outside the women’s body by a scientific process known as In-Vitro fertilization or IVF treatment. This entire process is done in a laboratory. In this process the eggs are taken from the mother’s ovary and fertilised by the sperms from the father.
Then the fertilized eggs are cultured for two to six days and allowed to be divided two to four times inside a test tube, thus the name test tube baby. These eggs are then implanted back into the uterus of a mother where it can develop normally. This is done with the sole intention for establishing and ensuring a successful pregnancy.

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Tick, beg bug and louse are parasitic insects that live on the skin of mammals or birds.
Housefly is not a parasite.

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The human immunodeficiency virus is a type of virus called a retrovirus. Like all viruses, human immunodeficiency virus reproduces using the genetic machinery of the cell it infects. With the help of an enzyme called integrase (also produced by HIV), the viral DNA becomes integrated with the cell’s DNA.