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.

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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.

1261. Reduced hybrid viability occurs when _____?

کم ہائبرڈ قابل عمل اس وقت ہوتی ہے جب _____؟

Check answer and explanation

Answer: Genes of different parents interact in different ways

Explanation Reduced hybrid viability occurs when the genes of different parent species interact in ways that impair the development or survival of the hybrid. This can lead to hybrids that are weaker or less viable than either of the parent species . This often leading to early death or developmental issues.

1262. Which of the following groups of tetrapods exhibit amniotic eggs?

ٹیٹراپوڈس کے مندرجہ ذیل گروپوں میں سے کون سے امینیٹک انڈوں کی نمائش کرتے ہیں؟

Check answer and explanation

Answer: Reptiles

Explanation Reptiles are the group of tetrapods that exhibit amniotic eggs. This allow for development on land without the need for water. This adaptation is a key feature distinguishing reptiles from amphibians.

1263. Which is a food type that occur naturally in a water body?

کون سی خوراک کی قسم ہے جو قدرتی طور پر پانی کے جسم میں پائی جاتی ہے؟

Check answer and explanation

Answer: Plankton

Explanation Plankton occurs naturally in water bodies. It serves as a primary food source for many aquatic species . It includes microscopic plants (phytoplankton) and animals (zooplankton) essential for the aquatic food chain.

1264. Excretion in Enteropneusts may involve a series of blood tissues called the ______?

انٹرپنیئٹس میں اخراج میں خون کے ؤتکوں کی ایک سیریز شامل ہوسکتی ہے جسے ______ کہتے ہیں؟

Check answer and explanation

Answer: Glomerulus

Explanation Enteropneusts (acorn worms) use the glomerulus as an excretory organ to filter waste from the blood. It functions similarly to a kidney in removing metabolic waste.

1265. Dispersal of animal without assistance of any factor is called as ______?

کسی بھی عنصر کی مدد کے بغیر جانور کے منتشر ہونے کو ______ کہا جاتا ہے؟

Check answer and explanation

Answer: Active Dispersal

Explanation Active dispersal occurs when animals move or migrate on their own without external assistance. This is typically done through their own energy and effort, like walking, swimming, or flying.

1266. Oceanic Islands: Galapagos Islands lie in ______?

سمندری جزائر: گالاپاگوس جزائر ______ میں واقع ہیں؟

Check answer and explanation

Answer: Pacific Ocean

Explanation The Galapagos Islands are located in the Pacific Ocean , off the coast of Ecuador . They are famous for their unique biodiversity and association with Charles Darwin's theory of evolution.

1267. Which element is found in organisms as 49% of their dry body weight?

کون سا عنصر حیاتیات میں ان کے خشک جسمانی وزن کے %49 کے طور پر پایا جاتا ہے؟

Check answer and explanation

Answer: Carbon

Explanation Carbon constitutes about 49% of an organism's dry body weight, being the backbone of organic molecules. It is essential for forming carbohydrates, proteins, lipids, and nucleic acids.

1268. In the inbreeding populations, the level of heterozygosity _______?

انبریڈنگ آبادیوں میں، مختلف الزواجہ کی سطح _______ ہے؟

Check answer and explanation

Answer: Decreases

Explanation In inbreeding populations, heterozygosity decreases . Because closely related individuals are more likely to share and pass on identical alleles. This leads to an increase in homozygosity , potentially exposing harmful recessive traits.

1269. Ampullae of Lorenzini is closely associated to ______?

لورینزینی کے ایمپلئی کا ______ سے گہرا تعلق ہے؟

Check answer and explanation

Answer: Temperature

Explanation Ampullae of Lorenzini are specialized electroreceptors in fish. It particularly sharks, used to detect temperature changes. These organs help fish sense electrical fields. This aiding in navigation, hunting, and detecting temperature variations in their environment.

1270. Which pattern in the hybrid zone leads to strengthening of reproductive barriers?

ہائبرڈ زون میں کون سا نمونہ تولیدی رکاوٹوں کو مضبوط کرنے کا باعث بنتا ہے؟

Check answer and explanation

Answer: Reinforcement

Explanation Reinforcement strengthens reproductive barriers by selecting against hybrid offspring, reducing gene flow between populations. This process promotes speciation by enhancing differences between diverging populations.

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