Free Introduction to Biology MCQs with Answers
123 Introduction to Biology MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Biology is divided into fields such as botany, zoology, microbiology, genetics, ecology, physiology and biotechnology, each focusing on a different aspect of life. Levels of biological organization progress from atoms and molecules through organelles, cells, tissues, organs and organ systems to organisms, populations, communities, ecosystems and the biosphere.
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123 questions · page 13 of 13
121. In humans, the largest body organ is:
- A. Liver
- B. Skin
- C. Brain
- D. Lungs
Explanation: The largest organ in the human body is the skin. It covers and protects our entire body, acting as a barrier against external elements. The skin has several important functions, including regulating body temperature, sensing touch, protecting against harmful UV radiation, and preventing the loss of water from the body. It's like a protective shield that keeps our body safe and maintains its overall health.
Correct answer: Skin122. Laiba is trying to determine the percentage of protein in bears because she is a
- A. Biochemist
- B. Microbiologist
- C. Physiologist
- D. Mycologist
Explanation: Laiba is a biochemist who is trying to determine the percentage of protein, a biomolecule, in beans. Moreover, a biochemist deals with the branch of science concerning the chemical processes taking place within an organism.
Correct answer: Biochemist123. The study of fishes is called:
- A. Ornithology
- B. Ichthyology
- C. Herpetology
- D. Ethology
Explanation: The correct answer is Ichthyology, which is the branch of zoology dedicated to the study of fishes. This field explores various aspects of fish biology, including their structure, function, and ecological roles. The other options represent different branches of zoology: Ornithology focuses on birds, Herpetology on amphibians and reptiles, and Ethology on animal behavior. None of these specifically address the study of fishes.
Correct answer: Ichthyology