Zoology MCQs - Everyday Science Practice | PakExamPoint

Practise Zoology MCQs in Everyday Science. Attempt multiple-choice questions, check answers and revise related subtopics.

Zoology MCQs and revision practice

Study Zoology through multiple-choice questions in Everyday Science. This subtopic contains 1568 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.

Use these Zoology MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.

Continue your revision with related topics: 100 Most Repeated MCQs of EDS PDF MCQs, Alloy MCQs, Atmosphere MCQs, Basics of Every Day Science EDS MCQs, Biology MCQs, Botany MCQs, Branch of Science MCQs, Cell MCQs.

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Zoology: questions and answer review

Try each question before opening its answer. Record the concept behind each mistake and revisit it during your next practice session.

691. Denitrification to nitric oxide and nitrous oxide is accomplished by ________?

نائٹرک آکسائیڈ اور نائٹرس آکسائیڈ کو ڈینیٹریفیکیشن ________ کے ذریعے مکمل کیا جاتا ہے؟

Check answer and explanation

Answer: Both A and B

Explanation Nitrobacter and Nitrosomonas are bacteria involved in the nitrogen cycle and can contribute to denitrification. They producing nitric oxide (NO) and nitrous oxide (N₂O). These gases are released during the conversion of nitrates into nitrogen gas under low oxygen conditions.

692. Which modifies the produced polysaccharides for secretion?

کون سا پیدا شدہ پولی سیکرائڈز کو سراو کے لیے تبدیل کرتا ہے؟

Check answer and explanation

Answer: Golgi apparatus

Explanation The Golgi apparatus modifies, sorts, and packages polysaccharides and proteins for secretion. It plays a key role in the processing and transport of cellular materials.

693. Population having no gene flow is said to be _____?

جین کے بہاؤ نہ ہونے والی آبادی کو _____ کہا جاتا ہے؟

Check answer and explanation

Answer: Isolated

Explanation A population with no gene flow is considered isolated . This meaning it does not exchange genetic material with other populations. Isolation can lead to genetic divergence. It potentially resulting in speciation over time.

694. Mesozoic Era constitutes the age of ______?

میسوزوک دور ______ کی عمر تشکیل دیتا ہے؟

Check answer and explanation

Answer: Reptiles

Explanation The Mesozoic Era (252–66 million years ago) is known as the " Age of Reptiles ". Because dinosaurs dominated the land during this period. This era includes the Triassic, Jurassic, and Cretaceous periods , leading to the rise of birds and mammals.

695. The movement of alleles among the populations is termed as ______?

آبادیوں کے درمیان ایللیس کی حرکت کو ______ کہا جاتا ہے؟

Check answer and explanation

Answer: Gene flow

Explanation Gene flow refers to the movement of alleles between populations through migration of individuals or gametes. It promotes genetic diversity and reduces differences between populations, potentially preventing speciation.

696. The capacity of the planet's ecosystem to provide services will be reduced if _____?

سیارے کے ماحولیاتی نظام کی خدمات فراہم کرنے کی صلاحیت کم ہو جائے گی اگر _____؟

Check answer and explanation

Answer: Biodiversity reduces

Explanation A reduction in biodiversity weakens ecosystems, decreasing their ability to provide essential services like food, clean air, and water. High biodiversity enhances ecosystem resilience and functionality. It supporting sustainable environmental services.

697. All of the following are H2-receptor antagonist drugs except?

مندرجہ ذیل مندرجہ ذیل ایچ ٹو رسیپٹر مخالف منشیات ہیں، علاوہ؟

Check answer and explanation

Answer: Omeprazole

Explanation Omeprazole is a proton pump inhibitor (PPI), not an H2-receptor antagonist. Cimetidine and Ranitidine are classic H2-receptor antagonists. While Fexofenadine is an H1-receptor antagonist (antihistamine).

698. Single large opening at the top of spongocoel is called _____?

اسپونگوکوئیل کے اوپری حصے میں واحد بڑی افتتاحی _____ کہلاتی ہے؟

Check answer and explanation

Answer: Osculum

Explanation The osculum is the large opening at the top of the spongocoel in sponges , through which water exits. It plays a key role in the water filtration system of sponges.

699. The main haemopoietic tissue in fish is _______?

مچھلی میں بنیادی ہیموپوئٹک ٹشو _______ ہے؟

Check answer and explanation

Answer: Kidney

Explanation The kidney is the main hematopoietic (blood-forming) tissue in fish. It producing red and white blood cells. It also plays a role in osmoregulation and waste excretion.

700. Small Islands have high rates of extinction due to __________?

چھوٹے جزائر میں _________ کی وجہ سے ناپید ہونے کی شرح زیادہ ہے؟

Check answer and explanation

Answer: All of the above

Explanation Small islands face high extinction rates due to limited resources , less diverse habitats, and competition among species. These factors reduce population resilience and increase vulnerability to environmental changes.

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