82 Humming bird is an example of________________? Biology Medium Full question → A Cold blooded anima l B Ectotherm C Endotherm D Heterotherm
83 Cellulose is the major component of__________? Biology Medium Full question → A Primary wall B Secondary wall C Middle lamella D all of the above
84 Conversion of ammonia or ammonium ion into nitrites during nitrogen cycle occurs due_____________? Biology Medium Full question → A Rhizobium B Nitrosomonas C Nitrobacter D Pseudomonas
85 Annual rainfall in grassland is about_____________? Biology Medium Full question → A More than 2500 mm B 750-1500 mm C 250-750 mm D Less than 250 mm
86 The first layer of cell wall which is formed is___________? Biology Medium Full question → A Primary wall B Secondary wall C Middle lamella D All of these
87 The productivity of aquatic ecosystem is basically determined by light and____________? Biology Medium Full question → A CO2 B O2 C Water D Nutrients
88 Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called__________? Biology Medium Full question → A Active transport B Passive transport C Co-transport D Counter transport
89 Ecosystem not found in Pakistan is_____________? Biology Medium Full question → A Tropical rain forest B Temperate deciduous forest C Grassland D Tundra
90 Which of the following is most constant abiotic component of ecosystem___________? Biology Medium Full question → A Air B Water C Land D Gravity
91 Percentage of proteins in cell membrane is____________? Biology Medium Full question → A 20-40% B 40-50% C 60-80% D 80-100%
92 _____________ supported theory of special creation? Biology Medium Full question → A Linnaeus B Aristotle C Mendel D Lamarck
93 In Hardy-Weinberg formula P2 represents frequency of_____________? Biology Medium Full question → A Recessive allele B Dominant allele C Homozygous dominant individual D Homozygous recessive individual
94 Who first observed and thus hypothesized that new cells are formed from previously existing living cell? Biology Medium Full question → A Theodor Schwann and Schleiden B Rudolph Virchows C Louis Pasteur D Both b and c
95 In condition of high temperature, following does not occur or occurs at low level__________? Biology Medium Full question → A Vasodilation B Activation of sweat glands C Thermogenesis D Evaporative cooling
96 “lubb” sound is produced due to___________________? Biology Medium Full question → A Opening of inlet valve B Closure of inlet valve C Opening of outlet valve D Closure of outlet valve
97 Who coined the term CELL? Biology Medium Full question → A Schwann B Schleiden C Robert Hook D Both a and b
98 Ozone depletion occurs commonly due to_______________? Biology Medium Full question → A Carbon dioxide B Chlorofluorocarbons C UV rays D Deforestation
99 Deoxygenated blood first enters in _________ part in fishes? Biology Medium Full question → A Sinus venosus B Right atrium C Left atrium D Conus arteriosus
100 According to cohesion-tension theory, tension is created by__________________? Biology Medium Full question → A Hydrogen bonding B Transpiration C Adhesion D Root prerssure