Biology Class 9th MCQs MCQs - General Science Practice | PakExamPoint
Practise Biology Class 9th MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Biology Class 9th MCQs MCQs and revision practice
Study Biology Class 9th MCQs through multiple-choice questions in General Science. This subtopic contains 178 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these Biology Class 9th MCQs 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.
الیکٹران خوردبین کے اعلی ریزولوشن کے لئے کیا ذمہ دار ہے؟
A. High magnification
B. Use of heavy metals strains
C. Short wavelength of the electron beam
D. Very thin section
Check answer and explanation
Answer: Short wavelength of the electron beam
Explanation The high resolution of the electron microscope is primarily due to the short wavelength of the electron beam. This shorter wavelength allows for higher resolution and the ability to visualize smaller structures.
کس مملکت کے ارکان میں خلیے کی دیوار ہوتی ہے اور سب ہیٹروٹروفک ہیں؟
A. Plantae
B. Fungi
C. Protista
D. Monera
Check answer and explanation
Answer: Fungi
Explanation Fungi have cell walls made of chitin and are all heterotrophic, obtaining nutrients by decomposing organic matter or forming symbiotic relationships. This distinguishes them from other kingdoms , making Fungi unique in their combination of cell walls and heterotrophy.
جھلی کی ساخت کے سیال موزیک ماڈل کے بارے میں کون سا بیان درست ہے؟
A. Higher the temperature, less fluid nature
B. The less unsaturated the fatty acid, the more fluid nature
C. The more unsaturated the fatty acid, the more fluid nature
D. The lower the temperature, more fluid nature
Check answer and explanation
Answer: The more unsaturated the fatty acid, the more fluid nature
Explanation The correct statement about the fluid mosaic model of membrane structure is: The more unsaturated the fatty acid, the more fluid nature. Unsaturated fatty acids have kinks in their tails that prevent the lipids from packing tightly together, thus increasing membrane fluidity.
ڈھانچے میں مختلف افعال ہوتے ہیں (فزیالوجی) لیکن ان کا اندرونی فن تعمیر ایک جیسا ہوتا ہے۔ _____
A. Homologous
B. Analogous
C. Vestigial
D. Rudimentary
Check answer and explanation
Answer: Homologous
Explanation Homologous structures are those that have different functions (physiology) but share similar internal architecture or morphology , indicating a common evolutionary origin. Examples include: Forelimbs of vertebrates (e.g., human arms, bird wings, whale flippers) Pelvic bones of different mammals
Explanation A proportion is an equation that states that two ratios are equal. It is often written in the form : a/b = c/d Where a, b, c, and d are values or quantities , and the ratio a/b is equal to the ratio c/d. For example : 2/4 = 3/6
کھادوں کی زیادہ حل پذیری بھی _____ کے ذریعے ماحولیاتی نظام کو خراب کرتی ہے؟
A. Acidification
B. Salinity
C. Erosion
D. Eutrophication
Check answer and explanation
Answer: Eutrophication
Explanation Eutrophication occurs when excess nutrients from fertilizers enter water bodies, stimulating excessive plant growth and depleting oxygen, harming aquatic life. This can lead to the formation of "dead zones" where few organisms can survive, degrading the ecosystem.
حیاتیات اور دیگر علوم کا مسئلہ حل کرنے کا طریقہ کیا ہے؟
A. Logical Method
B. Experimental Method
C. Scientific Method
D. Analytical Method
Check answer and explanation
Answer: Scientific Method
Explanation The scientific method is a systematic approach used to develop and test scientific knowledge, including in biology and other sciences. It involves: Observations Hypothesis formation Prediction Experimentation Data analysis Conclusion drawing
Explanation In a constructive reaction , also known as a synthesis reaction , large molecules are formed from smaller ones. This type of reaction involves the combination of two or more molecules to form a larger molecule, often with the release of energy.
Explanation The sun is the ultimate source of energy for our planet , providing energy through solar radiation. This energy is then converted into various forms , such as: Thermal energy (heat) Kinetic energy (wind, water currents) Electrical energy (generated from solar panels) Chemical energy (fossil fuels, biomass) Biological energy (food chains, ecosystems)
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