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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224. Which of the following statement about ciliates in incorrect?

Contain mainly unicellular organisms.
Their contractile vacuole is responsible for water regulation.
They are even capable of sexual reproduction.
Diploid nucleus being smaller is responsible for cells metabolism and growth while polyploidy nucleus functions in the sexual process.
✅ The correct answer is option D.

228. Chemically auxins are

Indole propionic acid.
Indole carboxylic acid.
Indole acetaldehyde
Indole acetic acid
✅ The correct answer is option D.
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