Biology

Biology Multiple Choice Questions and Answers (MCQ) PDF: Quizzes & Practice Tests with Answer Key. This section Biology basic concepts, theory and objective tests.

This section covers following topic MCQs: Bioenergetics, biological molecules, cell biology, coordination and control, enzymes, fungi, recyclers kingdom, gaseous exchange, growth and development, kingdom Animalia, kingdom plantae, kingdom prokaryotae, kingdom protoctista, nutrition, reproduction, support and movements, transport biology, variety of life, and homeostasis etc.

    Biology
    In an ecosystem, energy disposal for transfer from one tropic level to the next is in the form of
    The 10% of energy available for transfer from one trophic level to the next in an ecosystem is in the form of chemical energy. The producers capture the energy present in sunlight and convert it into chemical energy which is passed into onto other trophic levels.
    Author: rikazzz Comment
    Biology
    Hydra is an organism that reproduces asexually by
    When food is plentiful, many Hydra reproduce asexually by budding. The buds form from the body wall, grow into miniature adults and break away when mature.
    Author: rikazzz Comment
    Life Processes
    The human heart consists of _____ chambers.
    The human heart consists of four chambers: two atria, which are the receiving chambers of the heart and two ventricles, which are the pumping chambers of the heart. A fish heart has two chambers and a frog heart has 3 chambers.
    Author: rikazzz Comment
    Coordination and Control
    The outermost covering of the brain is called:
    The bony structure in our head is called the skull. Cranium is the part of the skull that encloses the brain. Three layers of meninges are present below the cranium. Eight bones enclose the brain and form the cranium and fourteen bones form the face. These bones together make up the skull.
    Author: rikazzz Comment
    Biology
    Food webs are generally known to be
    A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community. Another name for food web is consumer-resource system.
    Author: rikazzz Comment
    Heredity and Evolution
    The Law of Inheritance was postulated by:
    Gregor Johann Mendel, also known as the ‘Father of Genetics’, postulated the Laws of Inheritance. Genetics is the branch of science which studies the different laws that govern inheritance and heredity in living organisms.
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    Coordination and Control
    Ethylene is a gaseous plant hormone released outside the plant body.
    Ethylene is a gaseous plant hormone released outside the plant body, unlike other hormones which are released inside the plant body. This gaseous hormone induces the ripening of fruits.
    Author: rikazzz Comment
    Coordination and Control
    When your finger gets accidentally caught at the door, the pain message is sent to your brain through:
    The pain message is sent to our brain through the sensory nerves.These nerves carry impulses from the sense organs to either the spinal cord or the brain. Motor nerves carry impulses from the brain and spinal cord to the muscle and glands. Cerebellum and cerebrum are parts of the human brain.
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    Biology
    Which of the following vitamin deficiencies causes Xerophthalmia?
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    Biology
    Male harmone is
    The major sex hormone in men is testosterone, which is produced mainly in the testes. The testes are controlled by a small gland in the brain called the pituitary gland, which in turn is controlled by an area of the brain called the hypothalamus. Androgens are crucial for male sexual and reproductive function.
    Author: rikazzz Comment