PPSC ESE SCIENCE PAST PAPER 15-02-2026
پیپر میں جانے سے
پہلے یہ سوالات و سلیبس ایک بار ضرور پڑھ کر جائیں
PPSC 25
years Past Papers Click here
چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
- Sebaceous gland
- Mammary gland
- Salivary gland
- Thyroid gland
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Explanation
- Mammary glands are modified sweat glands.
- They produce milk for offspring.
- Structurally, they retain sweat gland features.
- They are present in mammals only.
- Hormones regulate their secretion.
Last updated question 17-02-2026
- Proximal tubule
- Distal tubule
- Collecting duct
- Loop of Henle
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Explanation
Sodium is most heavily reabsorbed in the proximal tubule of the kidney,
Accounts for approximately 65% to 70% of the total filtered sodium.
Last updated question 17-02-2026
- Sensory reception
- Respiration
- Digestion
- Excretion
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Explanation
- The lateral line detects water movements.
- It helps fish sense predators and prey.
- It consists of mechanoreceptors called neuromasts.
- It runs along the sides of the body.
- It is essential for navigation in water.
Last updated question 17-02-2026
- Tundra
- Taiga forest
- Temperate deciduous forest
- Grassland
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Explanation
Taiga, also called boreal forest, occurs in high northern latitudes.
Characterized by long, cold winters and short, mild summers.
Snow cover persists for much of the year.
Dominated by coniferous trees like pine, spruce, and fir.
Adapted for cold climate with needle-like leaves and conical shape to shed snow.
- Water
- Number of plants
- Amount of salt
- Temperature of water
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Explanation
The dependent variable is the factor that is measured or observed as a response to changes made by the experimenter.
In this specific experiment, the scientist is investigating how salt affects plant life
Therefore, the number of plants is the measured outcome that "depends" on the salinity levels.
- Systematics
- Alpha taxonomy
- Beta taxonomy
- Nomenclature
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Explanation
Alpha taxonomy deals with identifying, describing, and naming species.
It studies variation within species (intraspecific) and between species (interspecific).
Provides the basis for classification and naming organisms.
Focuses on morphological and genetic differences.
It is the first step in broader systematics studies.
- 2
- 5
- 1000
- 10000
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Explanation
pH is logarithmic: pH = -log[H⁺].
Each pH unit difference = 10× change in H⁺ concentration.
Difference between pH 5 and pH 2 = 3 units.
10³ = 1000 times more acidic.
Lower pH → higher hydrogen ion concentration.
- 1665
- 1676
- 1683
- 1680
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Explanation
Antonie van Leeuwenhoek first observed yeast cells using his single-lens microscope in 1680.
- Adaptation to life
- Origin of life
- New species origin
- Natural selection
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Explanation
Darwin did not propose the chemical origin of life.
He suggested life adapted over time from simple forms.
His “Origin of Species” focuses on evolution and natural selection.
Explains how species diversify and adapt.
The chemical origin of life is studied separately in abiogenesis.
Last updated question 17-02-2026
لفظ \"نفسیات\" کس زبان سے ماخوذ ہے؟
- Greek
- Latin
- Italian
- None of these
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Explanation
The word "psychology" is derived from the Greek language.
Psyche means “life” or “soul”. Logia means “the study of”.
In short, Psychology is the science entailing the study of the mind.
It includes the study of Behaviour, feelings, consciousness, and the unconscious mind.
Last updated question 17-02-2026
