LECTURER ZOOLOGY PAST PAPERS AND SYLLABUS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
میسنجر آر این اے پر تین اڈوں کی ترتیب کو ______ کہا جاتا ہے؟
A codon
Nucleotide
An anticodon
None of these
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Explanation
Key points about codons:
Triplet code : A codon consists of three bases.
Function : Each codon codes for a specific amino acid.
Location : Codons are found on messenger RNA (mRNA).
مکڑی کے ذریعہ اسپننگ ویب ______ کی مثال ہے؟
Habit
An instinct
Conditional reflex
None of these
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Explanation
Instinct is an inborn , automatic behavior that does not require learning , like a spider spinning its web. Unlike habit or trial and error learning, instincts are genetically programmed and present from birth.
ایک ہارمون جو کورٹیسون کی پیداوار کو متحرک کرتا ہے وہ ______ ہے؟
ACTH
Adrenaline
Cortin
None of these
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Explanation
Adrenocorticotropic hormone (ACTH) is secreted by the pituitary gland and stimulates the adrenal cortex to produce cortisol (cortisone). Adrenaline is involved in the fight-or-flight response. Cortin is an outdated term for adrenal hormones. Auxin is a plant hormone.
ہاضمہ نظام کا ایک حصہ جو کھانے کے ساتھ رابطے میں نہیں ہے ______ ہے؟
Large intestine
Small intestine
Liver
None of these
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Explanation
The liver plays a crucial role in digestion by producing bile, but food does not pass through it. In contrast, the stomach, small intestine, and large intestine are directly involved in food digestion and absorption.
کشیراتی آنکھ میں ، روشنی سب سے پہلے ______ سے گزرتی ہے؟
Retina
Pupil
Cornea
None of these
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Explanation
Key points about the light pathway in the eye:
Cornea : Light enters the eye through the cornea.
Pupil : After the cornea, light passes through the pupil, which is the opening controlled by the iris.
Lens : The lens then focuses the light onto the retina.
Retina : The retina is the light-sensitive tissue at the back of the eye where the image is formed.
انواع کے درمیان باہمی خلل کا ذمہ دار عنصر کو کیا کہا جاتا ہے؟
Invasion of exotic species
Habitat degradation
Climate change
None of these
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Explanation
Invasion of exotic species disrupts mutualism by introducing non-native species that compete with or harm native species. This can lead to ecological imbalances , threatening existing symbiotic relationships.
Mutualism
Commensalism
Parasitism
Symbiosis
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Explanation
Parasitism is a type of relationship where one organism ( the parasite) lives on or inside another organism (the host)
And benefits at the expense of the host, who is harmed by the interaction.
50%
75%
90%
99.9%
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Explanation
It is estimated that about 99.9% of all species that have ever existed on Earth are now extinct.
This figure underscores the vast extent of extinction events throughout:
Earth's history reflects the dynamic often unstable nature of life on the planet.
The remaining 0.1% of species are the ones that are still extant today.
Convergent evolution
Parallel evolution
Adaptive radiation
Co-evolution
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Explanation
Adaptive radiation is the process by which a single ancestral species rapidly diversify into a wide variety of f orms to adapt to different environments or ecological niches.
This typically occurs when a species colonizes a new habitat or experiences a significant environmental change.
Convergent
Divergent
Parallel
Adaptive
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Explanation
Divergent evolution occurs when two species that share a common ancestor evolve different trait s or characteristics over time due to adapting to different environments or ecological niches.
This process leads to increased differences between the species.
