Biology MCQs

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The term ‘living fossil’ represents the organisms that have survived major extinction events, with little evolutionary change for hundreds of millions of years. Ginkgo is one such example. Ginkgos are native to China and are virtually unchanged for over 200 million years. The water and pest resistant nature, coupled with an ability to cope with pollution, aids in their longevity. The plant is predominantly used for medicinal purposes, particularly in Traditional Chinese Medicine.

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By the age of two, the rennin and lactase enzymes start disappearing. However, these enzymes completely disappear by the age of eight in humans. After, this the stomach of person becomes mature enough to produce pepsin to digest the food.

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Alziemer’s is a disease which attacks the neural system, It results in continuous decline in the number brain cells which leads to loss of memory.

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Estrogen and progesterone are the female sex harmones. Estrogen is responsible for the development of secondary sexual characteristics. Progesterone supports during pregnancy and controls the menstrual cycles in women.

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Human beings have 46 chromosomes in their cells. 22 pairs of autosomes and 2 special chromosomes called sex chromosomes are present.

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The study of cell or cell biology is called cytology. The initial phase of cytology began with the English scientist Robert Hooke’s microscopic examination of cork in 1665. He observed dead cork cells and introduced the word “cell” to describe them.

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Virology, the branch of microbiology that deals with the study of viruses.

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Histology, also known as microscopic anatomy or microanatomy, is the branch of biology that studies the microscopic anatomy of biological tissues.

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Otorhinolaryngology is a medical specialty that focuses on the ear, nose, and throat.

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MOP Iyengar from Madras is considered the father of Indian Phycology. He discovered Fritschiella heterotrichus terrestrial algae.