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.

1191. ________ may cause reduction in the levels of nor epinephrine in hypothalamus.

ہائپوتھیلمس میں ایپی نیفرین کی سطح میں کمی کا سبب بن سکتا ہے۔ _____

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Answer: Estrogen

Explanation Estrogen has been shown to reduce the levels of norepinephrine in the hypothalamus. This hormone modulates neurotransmitter systems, including noradrenergic pathways , influencing behavior and physiological responses.

1192. Social behaviour in animals are of ________?

جانوروں میں سماجی رویے ________ کے ہوتے ہیں؟

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Answer: All of these

Explanation Social behavior in animals includes dominance and subordinate relationships, territorial rights, and leadership , which help maintain group structure and cooperation. These behaviors ensure survival, resource allocation, and reproductive success within animal communities.

1193. The role that humans play in artificial selection is to _____?

مصنوعی انتخاب میں انسان جو کردار ادا کرتے ہیں وہ _____ ہے؟

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Answer: Choose which organisms breed, and which do not

Explanation In artificial selection , humans choose which organisms breed based on desired traits, influencing the next generation . This process involves selecting organisms with specific characteristics. Unlike natural selection , which occurs without human intervention.

1194. The predominant force stabilizing tertiary protein structure in aqueous environment is?

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Answer: Hydrophobic interactions

Explanation I n water, hydrophobic side chain s fold inward, away from water. This drives the overall 3D shape (tertiary structure) of proteins. Hydrogen bonds, ionic bonds, and disulfide bridges also contribute but are secondary to hydrophobic interactions in aqueous environments. Last updated question 25 feb 2026

1195. Cnidarians have a unique feature of presence of specialized organelles that eject a stinging thread called _____?

نیڈیرینس میں مخصوص آرگنیلز کی موجودگی کی ایک انوکھی خصوصیت ہوتی ہے جو _____ نامی ڈنکنگ دھاگے کو نکالتا ہے؟

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Answer: Nematocysts

Explanation Nematocysts are specialized stinging organelles found within cnidocytes of cnidarians. They eject a thread to capture prey or for defense when triggered.

1196. Total species of?

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Answer: 2.3 millions

Explanation As of the most widely accepted recent estimates, about 2.13 million species have been formally described by scientists . This number includes: Animals (insects, mammals, birds, etc.) Plants Fungi Protists Bacteria and archaea (though many microbes remain undescribed)

1197. In a typical fish number of lateral line is ______?

ایک عام مچھلی میں لیٹرل لائن کا نمبر ______ ہے؟

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Answer: 1

Explanation Most fish typically have one lateral line system running along each side of their body. The lateral line detects vibrations and movements in the water. It aiding fish in navigation and prey detection.

1198. Lithosphere, a physical shell of earth constitutes ______?

لیتھوسفیئر، زمین کا ایک جسمانی خول ______ ہے؟

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Answer: The earth’s surface

Explanation The lithosphere constitutes the Earth's surface. It including the crust and the upper mantle. It forms the rigid, outermost physical shell of the planet.

1199. Among following, which taxon exhibits pronounced level of polyploidy?

مندرجہ ذیل میں سے، کون سا ٹیکسن پولی پلاڈی کی واضح سطح کو ظاہر کرتا ہے؟

Check answer and explanation

Answer: Fishes

Explanation Polyploidy , the presence of multiple sets of chromosomes, is pronounced in many fish species, aiding in adaptation and speciation. This phenomenon is less common in amphibians, rodents, and other taxa.

1200. How many mitotic attempts are needed to have pool of 64 from single cell?

سنگل سیل سے 64 کا پول رکھنے کے لئے کتنی مائٹوٹک کوششوں کی ضرورت ہے؟

Check answer and explanation

Answer: 6

Explanation In mitosis, a single cell divides into two , and each subsequent division doubles the number of cells . To reach a pool of 64 cells , 6 mitotic divisions are required (2^6 = 64).

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