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۔
Like
Likely
Alike
Dislike
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Explanation
The sentence should read : "The new findings on the virus caused panic among the scientists and management alike ." The word "alike" is used to indicate that both scientists and management shared a similar reaction (panic) to the new findings.
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.
Exoskeleton
Notochord
Open circulatory system
Segmented body
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Explanation
The notochord is a flexible, rod-shaped structure that is present during the embryonic stage of all chordates
It provides support and defines the primitive axis of the body.
This characteristic is a key feature that distinguishes chordates from non-chordates.
Phylum
Order
Family
Genus
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Explanation
In the taxonomic hierarchy, the rank that comes directly below the class is the order.
The full hierarchy from broader to more specific categories is:
Domain Kingdom Phylum Class Order Family Genus Species.
Genotype
Phenotype
Allele
Karyotype
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Explanation
The phenotype refers to the observable physical characteristics or traits of an organism, such as:
height eye color skin texture.
Mechanical support
Intracellular communication
Energy storage
Protection against pathogens
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Explanation
Gap junctions are specialized structures that allow direct communication between adjacent cells.
They are formed by connexin proteins that create channels enabling the exchange of ions, metabolites, and other small molecules between cells.
Sharks
Salmon
Tuna
Goldfish
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Explanation
Sharks, along with other cartilaginous fish-like rays, retain urea in their bodies as part of their osmoregulatory strategy.
This helps them maintain osmotic balance in marine environments by making their internal body fluids isotonic with the surrounding seawater.