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.
B. Blood meets water with higher O₂ content continuously
C. Minimal diffusion
D. Blood and water flow in same direction
Check answer and explanation
Answer: Blood meets water with higher O₂ content continuously
Explanation Water and blood flow in opposite directions . This is called the countercurrent mechanism . It maintains a constant oxygen concentration gradient . Blood always contacts water with higher O₂ level . This ensures maximum oxygen absorption in fish gills.
ریڑھ کی ہڈی والے جانوروں کا درجہ حرارت کو کنٹرول کرنے والا مرکز ______ میں واقع ہے؟
A. Medulla oblongata
B. None of these
C. Hypothalamus
D. Thyroid gland
Check answer and explanation
Answer: Hypothalamus
Explanation The hypothalamus controls the body's temperature by detecting changes and initiating responses to maintain homeostasis. It regulates processes like sweating, shivering, and blood flow to adjust body temperature.
اس ذیلی طبقے کے تحت پستان دار جانور جوان کو جنم دیتے ہیں؟
A. Metatheria
B. Prototheria
C. Eutheria
D. None of these
Check answer and explanation
Answer: Eutheria
Explanation Eutherian mammals give birth to fully developed young ones and have a well-developed placenta (e.g., humans, dogs, and elephants). In contrast, Metatheria (marsupials) give birth to underdeveloped young, and Prototheria (monotremes) lay eggs.
وسائل جسم کے باہر استعمال ہوتے ہیں، ان کے جمع ہونے سے وہ کون سے نکل جاتے ہیں؟
A. Renewable
B. None of these
C. Nonrenewable resources
D. Unaltered resources
Check answer and explanation
Answer: Unaltered resources
Explanation Unaltered resources are natural resources that remain in their original state after use and do not undergo significant transformation. These resources, like sunlight or air , are not consumed by the user and can continue to be available for use.
Explanation The Permian extinction , around 155 million years ago , marked the end of the Paleozoic Era. It was the largest mass extinction in Earth's history , wiping out over 90% of marine species.
کسی مخصوص علاقے میں ایک ساتھ رہنے والے پودوں اور جانوروں کی آبادی کا گروپ ______ کہلاتا ہے؟
A. Community
B. Ecosystem
C. Biosphere
D. None of these
Check answer and explanation
Answer: Community
Explanation A community refers to a group of populations of different plant and animal species living together in a specific area. These populations interact with each other in various ways. This forming a complex web of relationships.
Explanation Sediments , including fossil fuels and sedimentary rock. They are the largest reservoirs of carbon on Earth. They store carbon for long periods . It playing a key role in the global carbon cycle.
Explanation Head – Contains the nucleus and acrosome for fertilization. Neck – Connects the head to the middle piece and contains centrioles. Middle piece – Packed with mitochondria to provide energy for movement. Tail – Propels the sperm forward for fertilization.
Explanation Biomolecules like proteins, nucleic acids, and polysaccharides are primarily polymeric . Polymeric is composed of repeating monomeric units. These macromolecules play essential roles in biological processes, including structure, function, and regulation.
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