Biology MCQs

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The Stomata in the aquatic plants is found and available on upper surface only. Stomata are crucial for plant functioning as they play fundamental role in the regulation of gas exchange between the plant and its surrounding environment.

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A ripe Tomato is Red, Leaves are Green, Flower is Purple, Hair is Black. The pigments responsible for these colors are Lycopene, Chlorophyll, Anthocyanin, Melanin respectively.

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Reserpine is a tranquilizer drug that was extensively used in the mid-20th century for treating high blood pressure and psychosis. Derived from the roots of the Indian Snakeroot plant, it has a calmative effect. While not majorly used today due to side effects like depression, it was a significant stepping stone in the development of modern psychiatric medications. Its primary action is to deplete catecholamines and serotonin from the body.

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Cirrhosis is a late stage of scarring (fibrosis) of the liver caused by many forms of liver diseases and conditions, such as hepatitis and chronic alcoholism. Alcoholism is the most common cause of cirrhosis in the world. It occurs when the liver is damaged over time and cannot function properly, leading to scarring and eventually cirrhosis.

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The building blocks of the human body are cells. Cells are the smallest unit of life and they perform all the functions necessary for the body to function. There are many different types of cells in the body, including muscle cells, nerve cells, and blood cells. These cells are organized into tissues, which are groups of similar cells that work together to perform a specific function. Tissues are then organized into organs, which are structures made up of multiple tissues that work together to perform a specific function, such as the heart or the liver. Organs are then organized into systems, which are groups of organs that work together to perform a specific function, such as the respiratory system or the circulatory system. Together, these building blocks allow the body to function as a whole.

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Britain is the first country to issue research licenses for human embryonic cloning to create stem cells. The cloning procedure involves the process of combining a patient’s body cell with an unfertilized egg cell from a donor.

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Foot and mouth disease (FMD) or hoof and mouth disease (HMD) is an infectious and sometimes fatal viral disease that affects cloven-hoofed animals. Cattle, Sheeps and Pigs are affected by the Foot & Mouth disease.

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Euthenics is the branch of biology that studies the improvement of human race by improving environment. Eugenics is the branch of biology that studies the Improvement of human race through laws of heredity. Euphenics is the branch of biology that studies the improvement of human race by drug treatment or genetic engineering. Etiology is the branch of biology that studies the Life cycle of causal organisms of the disease.

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R.H. Whittaker proposed an elaborated five kingdom classification. He was the first to propose the five-kingdom of organisms taxonomic classification of the world’s biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. He also proposed the Whittaker Biome Classification, which categorized biome-types upon two abiotic factors: temperature and precipitation.

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Tropical deciduous forests shed their leaves for about six to eight weeks in summer. As this is a hot-dry season, the leaves get dry due to high temperature and deficiency of moisture causing these trees to shed their leaves.