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.
Explanation Biodiversity is impacted by various human activities, including : Pollution : Chemical pollutants can alter ecosystems , affecting species development, growth, and survival. Deforestation : Habitat destruction and fragmentation lead to population decline , isolation, and extinction. Overhunting : Overexploitation of species for food, trophies , or other purposes can deplete populations and drive extinctions.
B. All living organisms are made up of one or more cells
C. Cell is the fundamental unit of life
D. Cell does not contain the hereditary material
Check answer and explanation
Answer: Cell does not contain the hereditary material
Explanation The correct answer is : Cell does not contain the hereditary material. The cell theory postulates: All living organisms are made up of one or more cells. The cell is the fundamental unit of life. New cells are derived from pre-existing cells (biogenesis).
سینٹریول بنانے کے لیے ایک خاص پیٹرن میں ترتیب دیے گئے مائیکرو ٹیوبولس _____ تعداد میں ہوتے ہیں۔
A. 26
B. 27
C. 23
D. 25
Check answer and explanation
Answer: 27
Explanation Centrioles are composed of 27 microtubules arranged in a specific pattern of nine triplets (9 x 3 = 27). These microtubules are highly stable and form a rigid structure that plays a critical role in the formation of cilia , flagella, and spindle fibers during cell division.
وہ جانور جو مستقبل میں معدوم ہونے کے خطرے سے دوچار ہیں؟
A. Extinct
B. Vulnerable
C. Endangered
D. Threatened
Check answer and explanation
Answer: Endangered
Explanation Endangered species are animals, plants , or fungi that are at risk of becoming extinct in the near future. They are threatened by various factors , such as habitat loss, pollution, climate change, overhunting, and human activities.
A. A fact based on quantitative data that is falsified
B. The same thing as an unproven theory
C. A verifiable observation
D. A tentative explanation that can be tested and is falsified
Check answer and explanation
Answer: A tentative explanation that can be tested and is falsified
Explanation A hypothesis is a proposed explanation for a phenomenon or a problem that can be tested through scientific investigation. It is a educated guess that provides a possible answer to a question or problem. A hypothesis must be testable and falsifiable , meaning that it can be proven or disproven through experimentation or data collection.
Explanation The mismatched one is : Telophase → Nuclear membrane disappear. In Telophase, the nuclear membrane reforms around each set of chromosomes, not disappears. The nuclear envelope breaks down during Prophase, and reforms in Telophase.
Explanation The dark reaction , also known as the Calvin cycle. It is a light-independent reaction that occurs in the stroma of the chloroplast. This process uses the energy from ATP and NADPH produced in the light-dependent reactions to convert carbon dioxide into glucose.
مائٹوسس کا مرحلہ جس میں کرومیٹڈز قطبوں تک پہنچ جاتے ہیں اور ان کی حرکت بند ہو جاتی ہے؟
A. Telophase
B. Prophase
C. Anaphase
D. Metaphase
Check answer and explanation
Answer: Telophase
Explanation In Telophase, the chromatids (now called chromosomes) have reached the poles of the cell and their movement ceases. The nuclear envelope begins to reform around each set of chromosomes, and the cytoskeleton reorganizes to prepare the cell for cytokinesis (cell division).
نامیاتی مواد (خوراک) کی نقل و حرکت ______ کے ذریعے ہوتی ہے؟
A. Phloem
B. Tracheid
C. Vessels
D. Xylem
Check answer and explanation
Answer: Phloem
Explanation Phloem is the vascular tissue responsible for transporting organic materials, such as sugars, amino acids, and other nutrients. Produced by photosynthesis from the leaves to the rest of the plant, including roots, stems, and fruits.
آئی پیس اور _____ لینس کی طاقت کے مرکب کا استعمال کرکے ہلکی خوردبین کی میگنیفیکیشن بنائی جاتی ہے۔
A. Concave
B. Objective
C. Convex
D. Mirror
Check answer and explanation
Answer: Objective
Explanation The magnification of a light microscope is formed by a combination of the eyepiece and objective lens. The objective lens collects and magnifies light from the sample. It is then further magnified by the eyepiece, producing the final magnification.
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