Ecosystem not found in Pakistan is_____________?
(A) Tropical rain forest
(B) Temperate deciduous forest
(C) Grassland
(D) Tundra
Which of the following is most constant abiotic component of ecosystem___________?
(A) Air
(B) Water
(C) Land
(D) Gravity
Percentage of proteins in cell membrane is____________?
(A) 20-40%
(B) 40-50%
(C) 60-80%
(D) 80-100%
_____________ supported theory of special creation?
(A) Linnaeus
(B) Aristotle
(C) Mendel
(D) Lamarck
In Hardy-Weinberg formula P2 represents frequency of_____________?
(A) Recessive allele
(B) Dominant allele
(C) Homozygous dominant individual
(D) Homozygous recessive 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
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
“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
Which of the following cytoskeletal fiber contain tubulin protein?
(A) One which help in assembly of spindles during mitosis.
(B) One involved in internal cell motion.
(C) One involved in maintenance of cell shape.
(D) Both b and c