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Biology 1525 MCQs [All-Courses]

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Biology covers key concepts of life, organisms, and human systems with exam-focused notes for PPSC, FPSC, KPPSC, BPSC.,NTS, OTS, AJKPSC. Clear, concise topics help students prepare effectively for competitive tests.

All Topics  1525

Which of the following is most constant abiotic component of ecosystem___________?
A Air
B Water
C Land
D Gravity
Correct Answer: Gravity
Percentage of proteins in cell membrane is____________?
A 20-40%
B 40-50%
C 60-80%
D 80-100%
Correct Answer: 60-80%
_____________ supported theory of special creation?
A Linnaeus
B Aristotle
C Mendel
D Lamarck
Correct Answer: Linnaeus
In Hardy-Weinberg formula P2 represents frequency of_____________?
A Recessive allele
B Dominant allele
C Homozygous dominant individual
D Homozygous recessive individual
Correct Answer: Homozygous dominant individual
Who first observed and thus hypothesized that new cells are formed from previously existing living cell?
A Theodor Schwann and Schleiden
B Rudolph Virchows
C Louis Pasteur
D Both b and c
Correct Answer: Rudolph Virchows
In condition of high temperature, following does not occur or occurs at low level__________?
A Vasodilation
B Activation of sweat glands
C Thermogenesis
D Evaporative cooling
Correct Answer: Thermogenesis
“lubb” sound is produced due to___________________?
A Opening of inlet valve
B Closure of inlet valve
C Opening of outlet valve
D Closure of outlet valve
Correct Answer: Closure of inlet valve
Adult birds normally possess only one functional____________?
A Ureter
B Ovary
C Lung
D Testis
Correct Answer: Ovary
Proteins comprise of ___________% of the total dry weight of a cell?
A 40%
B 50%
C 60%
D 70%
Correct Answer: 50%
Double fertilization occurs in_________?
A All plants
B All seed plants
C Gymnosperms
D Angiosperms
Correct Answer: Angiosperms
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