Biology

Get the best Biology MCQs with answers and explanations for exam preparation and job tests. Our collection covers cell biology, genetics, human physiology, plant biology, microbiology, biotechnology, and environmental science. These Biology multiple-choice questions are designed for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, CSS, PMS, university entry tests, and medical admission tests. Practice online to improve your concepts and score higher with our updated and comprehensive Biology MCQs.

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194. Which statement about the profundal zone is correct?

Plants are unable to anchor but enough light penetrates to support photosynthesis
Phytoplanktons in this region are cyanobacteria
Decomposers and detritus feeders inhabit it
Water lilies are abundant
✅ The correct answer is option C.

196. Eutrophication is

The process of decreasing nutrients by human activities
Adequate nutrition accelerated by human activities
Changing the trophic levels of an ecosystem by human activities
Addition of more predators in an ecosystem
✅ The correct answer is option B.
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