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.
اکیلے موقع کی وجہ سے جین کی تعدد کے بے ترتیب اتار چڑھاؤ کو کیا کہتے ہیں؟
A. Gene flow
B. None of these
C. Genetic drift
D. Out-breeding
Check answer and explanation
Answer: Genetic drift
Explanation Genetic drift refers to random changes in gene frequencies within a population. It occurring purely by chance rather than natural selection. It is more pronounced in small populations. It can lead to loss of genetic variation or fixation of alleles over time.
Explanation Non-polar neurons lack distinct axons and dendrites. They are seen in sponges , which have a simple nerve-less body structure. Sponges rely on water flow and do not have a true nervous system.
انسانی گردے کی ڈسٹل نالی _______ کو منظم کرنے میں کلیدی کردار ادا کرتی ہے؟
A. Salts
B. Secretions
C. Water balance
D. None of these
Check answer and explanation
Answer: Salts
Explanation The distal tubule of the human kidney helps regulate the balance of salts (electrolytes) by selectively reabsorbing sodium and secreting potassium. This process is crucial for maintaining electrolyte balance and blood pressure.
Explanation The temperature of 135-145°C is required for the extrusion process to ensure proper cooking and texture . Extrusion involves the application of heat and pressure to shape the feed into pellets or other forms.
غذائی اجزاء، فضلہ کی مصنوعات، اور گیسوں کے تبادلے کی شرح _______ کے متناسب ہے؟
A. Size of the molecule
B. Membrane surface area
C. Cell volume
D. None of these
Check answer and explanation
Answer: Membrane surface area
Explanation The rates of exchange for nutrients, waste products, and gases are directly proportional to the surface area of the cell membrane , as it increases the space for exchange. A larger membrane surface area allows for more efficient diffusion of substances in and out of the cell.
زیادہ تر عام کیڑے مار دوا ______ اکثر استعمال ہوتے ہیں؟
A. Craganochlorines
B. None of these
C. Olegins
D. Organophosphates
Check answer and explanation
Answer: Organophosphates
Explanation Organophosphates are the most commonly used pesticides. It affecting the nervous system of pests by inhibiting acetylcholinesterase. They are widely used in agriculture but can be toxic to humans and wildlife.
پر رہنے والی انواع _______ پر رہنے کی نسبت معدوم ہونے کا زیادہ خطرہ ہیں؟ ______
A. None of these
B. Continent, Island
C. Estuarine, Freshwater
D. Island, Continent
Check answer and explanation
Answer: Island, Continent
Explanation Species living on islands are more vulnerable to extinction. Due to their limited range, isolation, and smaller populations. Continental species typically have larger habitats and populations . It offering them greater resilience to threats.
تمام یوکرائٹس کے پاس خلیے ہوتے ہیں جس میں ______ ہوتا ہے؟
A. RNA
B. Sugar
C. None of these
D. DNA
Check answer and explanation
Answer: DNA
Explanation All eukaryotic cells have a membrane-bound nucleus that contains DNA . DNA stores genetic information . This DNA controls cellular functions . It is passed on during cell division.
انتخاب کی شکل جو ظاہر ہوتی ہے جب مرد علاقوں کے لیے مقابلہ کرتے ہیں؟
A. Sexual selection
B. Directional selection
C. Stabilizing selection
D. None of these
Check answer and explanation
Answer: Sexual selection
Explanation Sexual selection occurs when individuals, typically males , compete for mates or territories to increase reproductive success. This form of selection leads to traits that improve mating opportunities, such as larger size or stronger aggression in males.
Explanation The exoskeleton of coelenterates is made of Calcium carbonate. Coelenterates like corals primarily have exoskeletons composed of calcium carbonate
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