BIOLOGY
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
جسم کا درجہ حرارت مستقل برقرار رکھنے والے فقاری جانور کیا کہلاتے ہیں؟
- Cold-blooded
- Warm-blooded
- Both A and B
- None
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Explanation
- Warm-blooded vertebrates, also known as endothermic vertebrates.
- Warm-blooded are animals that maintain a constant body temperature, regardless of the temperature of their surroundings.
- They are able to generate heat internally and regulate their body temperature, allowing them to maintain a relatively constant body temperature.
- Examples: birds and mammals.
فقاری جانور جو اپنے اردگرد کا درجہ حرارت برداشت کرتے ہیں انہیں کہا کیا جاتا ہے؟
- Cold-blooded
- Warm-blooded
- Both A and B
- None
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Explanation
- Cold-blooded vertebrates are animals that take on the temperature of their surroundings.
- They are also known as ectothermic vertebrates.
- Their body temperature is regulated by the environment around them, and they often bask in the sun or seek shade to control their body temperature.
- Examples: fish, amphibians, and reptiles.
درجہ حرارت کے ضابطے کی بنیاد پر کثیرکا جانوروں کو کتنے اہم گروہوں میں تقسیم کیا گیا ہے؟
- 2
- 3
- 4
- 5
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Explanation
Vertebrates are divided into two main groups based on temperature regulation:
- Cold-blooded (ectothermic) vertebrates, which include: Fish, Amphibians and Reptiles
- Warm-blooded (endothermic) vertebrates, which include: Birds and Mammals (including humans)
ریڑھ کی ہڈی والے جانور کیا کہلاتے ہیں؟
- Vertebrates
- Invertebrates
- Both A and B
- None
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Explanation
Vertebrates are animals that have a backbone or spinal column. This group includes:
- Fish
- Amphibians
- Reptiles
- Birds
- Mammals (including humans)
جانوروں کو کتنے اہم گروہوں میں درجہ بندی کیا گیا ہے؟
- 2
- 4
- 5
- 6
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Explanation
Animals are classified into two main groups:
- Invertebrates (animals without a backbone). Examples: insects, spiders, squids, octopuses, starfish, corals, worm
- Vertebrates (animals with a backbone. Examples: fish, amphibians, reptiles, birds, mammals (including humans)
درج ذیل میں سے کس میں کلوروفل موجود نہیں ہے؟
- Bacteria
- Fungi
- Animals
- Both A and C
- All of these
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Explanation
- Fungi are multicellular organisms, consisting of many cells that work together to form complex structures like mushrooms and molds.
- They have modified cell wall and nucleus.
- They have not chlorophyll.
- Animals, including humans, are multicellular organisms made up of many cells that work together to form tissues, organs, and systems.
- They have modified nucleus but don't have cell wall.
- They have not chlorophyll.
- Bacteria are unicellular organisms.
- They have cell wall but don't have proper nucleus.
- It doesn't contain chlorophyll.
- It is used to make medicines, yogurt and cheese.
درج ذیل میں سے کس میں کلوروفل موجود ہے؟
- Algae
- Bacteria
- Animals
- Plants
- Both A and D
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Explanation
- Plants are multicellular, composed of many cells that work together to form roots, stems, leaves, and other structures.
- They have modified cell wall and nucleus.
- They have chlorophyll.
- Algae are unicellular with proper cell wall and nucleus.
- It contain chlorophyll.
- It causes diseases: Cutleria, Ulva and Volvox.
مندرجہ ذیل میں سے کون سا کثیر خلوی جاندار ہے/ہیں (کئی خلوی)؟
- Fungi
- Plants
- Animals
- Both A and B
- All of these
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Explanation
- Fungi are multicellular organisms, consisting of many cells that work together to form complex structures like mushrooms and molds.
- They have modified cell wall and nucleus.
- They have not chlorophyll.
- Plants are multicellular, composed of many cells that work together to form roots, stems, leaves, and other structures.
- They have modified cell wall and nucleus.
- They have chlorophyll.
- Animals, including humans, are multicellular organisms made up of many cells that work together to form tissues, organs, and systems.
- They have modified nucleus but don't have cell wall.
- They have not chlorophyll.
- Tactile
- Turgor
- Growth
- None of these
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Explanation
The Mimosa plant exhibits thigmonastic movement, which is a type of tactile or touch-induced movement.
When the Mimosa plant's leaves are touched or disturbed
They rapidly fold inward and droop, a phenomenon known as thigmonastic movement or thigmonasty.
This response is thought to be a defense mechanism against herbivores or other threats.
The movement is not due to changes in turgor pressure or growth
But is instead a rapid reversible response to mechanical stimulation.
- planaria
- starfish
- sycon
- nereis
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Explanation
Planaria has a diffused nervous system.
Planarians, which are flatworms belonging to the genus Planaria, have a primitive nervous system known as a diffused nerve net.
This nerve net is spread throughout the body and lacks the centralized organization found in more complex nervous systems.
Despite its simplicity, this nervous system allows planarians to exhibit basic behaviors such as:
- movement
- feeding
- response to stimuli