Biology MCQs

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The aorta (the main blood supplier to the body) branches off into two main coronary blood vessels (also called arteries). These coronary arteries branch off into smaller arteries, which supply oxygen-rich blood to the entire heart muscle. The right coronary artery supplies blood to the right side of the heart.

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

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The science of taxonomy is related to Plant Classification. Carl Linnaeus is the father of modern Taxonomy. Linnaeus, in his book System Naturae, has divided all living beings into two kingdoms – the plant kingdom and the animal kingdom.

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Leucoplast is colorless or non-pigmented in nature. It is used for storage. Amyloplasts store starch, proteinoplasts and aleuroplasts as well as modify proteins.

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Cholesterol is a type of Lipid or the fat present in blood. The majority of the cholesterol consumed by the human body on a daily basis is synthesised by Liver.

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Thallophytes are commonly known as algae. Algae are chlorophyll-bearing, simple, thalloid, autotrophic and largely aquatic organisms. They are found in a wide variety of habitats such as moist rocks, soil and wood.

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Fungi that get their food directly from dead organic matter are called Decomposers.

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Bryophytes are the first plants that lived on land.

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Dicotyledonous branches are found in Liverworts. Liverworts are also moss-like land plants that do not have a vascular system.