MCQ Collection
MDCAT Biology MCQs
Practice MDCAT Biology questions with answers and explanations.
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Correct Answer: A. The first diploid cell formed after fertilization
Explanation:
The zygote contains genetic material from both parents.
It divides by mitosis during early development.
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Correct Answer: B. The first diploid cell formed after fertilization
Explanation:
The zygote contains genetic material from both parents.
It divides by mitosis during early development.
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Correct Answer: C. The first diploid cell formed after fertilization
Explanation:
The zygote contains genetic material from both parents.
It divides by mitosis during early development.
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Correct Answer: D. Maintenance of a relatively stable internal environment
Explanation:
Homeostasis keeps internal variables within suitable ranges.
Feedback systems coordinate sensors, control centers, and effectors.
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Correct Answer: A. Maintenance of a relatively stable internal environment
Explanation:
Homeostasis keeps internal variables within suitable ranges.
Feedback systems coordinate sensors, control centers, and effectors.
Choose an option to check your answer.
Correct Answer: B. Maintenance of a relatively stable internal environment
Explanation:
Homeostasis keeps internal variables within suitable ranges.
Feedback systems coordinate sensors, control centers, and effectors.
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Correct Answer: C. A response that counteracts a change
Explanation:
Negative feedback stabilizes variables such as temperature and glucose.
It is the most common homeostatic mechanism.
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Correct Answer: D. A response that counteracts a change
Explanation:
Negative feedback stabilizes variables such as temperature and glucose.
It is the most common homeostatic mechanism.
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Correct Answer: A. Reproduction involving one parent without gamete fusion
Explanation:
Asexual offspring are usually genetically similar to the parent.
Examples include binary fission, budding, and vegetative propagation.
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Correct Answer: A. A response that counteracts a change
Explanation:
Negative feedback stabilizes variables such as temperature and glucose.
It is the most common homeostatic mechanism.
Choose an option to check your answer.
Correct Answer: B. Reproduction involving one parent without gamete fusion
Explanation:
Asexual offspring are usually genetically similar to the parent.
Examples include binary fission, budding, and vegetative propagation.
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Correct Answer: B. A response that amplifies an initial change
Explanation:
Positive feedback drives a process toward completion.
Examples include blood clotting and labor contractions.
