Biology MCQs

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Haemophilia is a mostly inherited genetic disorder that impairs the body’s ability to make blood clots, a process needed to stop bleeding. This results in people bleeding longer after an injury, easy bruising, and an increased risk of bleeding inside joints or the brain.

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The hypothalamus in the brain controls body temperature by regulating heat production and loss:
Temperature comparison: The hypothalamus compares the body’s current temperature to the normal temperature of around 37°C.
Heat production: If the body is too cold, the hypothalamus triggers heat production.
Heat loss: If the body is too hot, the hypothalamus triggers heat loss, such as sweating or giving off heat.

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The transmission of characteristics from parent to offspring is called heredity, and can be inferred from inherited characteristics.

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Parazoology is the branch of zoology that deals with the study of parazoa, primitive multicellular animals that lack true tissues and organs. It encompasses the study of Porifera (sponges), one of the most primitive animal phyla that date back to the Precambian era over 600 million years ago.

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Françoise Barré-Sinoussi and Luc Montagnier were awarded the Nobel Prize in Medicine for the discovery of Human Immunodeficiency Virus in 2008.

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Hepatitis C, Hepatitis B and Herpes simplex virus type 2 viruses which are linked to human cancer.

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Lactobacillus cacaonum is a bacteria used in the food packaging industry for making chocolates. Lactobacillus bucheri is helpful in making wine. Lactobacillus casei is used in making cheese. Monosodium glutamate is used in Chinese food to enhance taste.

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Xylem and phloem are not found in Bryophyta, so they are called non-vascular embryophytes.

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The root system present in gymnosperms is the taproot system. Tap roots somewhat dilute the root of the upright plant and grow vertically downwards.

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Lamina is part of Leaf. It is also known as leaf blades. This is the green, flat surface of the leaves and consists of a small branched vein and veins.