A) Fresh water B) Estuarine C) Eschew D) Marine
A) Presence of high-level oxygen B) High salinity C) Low light penetration D) Presence of low level oxygen
A) Meridian zone B) Littoral zone C) Benthic zone D) Supratidal zone
A) Variation in temperature B) High concentration of oxygen content C) Low salinity D) Low concentration of oxygen content
A) Etrophication B) Eutriphication C) Eutrophication D) Eutropication
A) Presence of thick barks B) Presence of broad leaves C) Existence of canopies D) Presence of buttress root.
A) Kalahari desert B) Great Australian desert C) Great Britain desert D) Arabian desert
A) Respiratory medium B) Transportation medium C) Water vapour D) Respiratory surface
A) Moist surface B) Small area to aid easy diffusion of gases C) Large surface area to aid easy diffusion of gases D) Thin-walled to shorten diffusion distance and make diffusion easier and faster
A) Gill filament B) Gill arch C) Gill raker D) Gill fume
A) Selective reabsorption B) Hormonal secretion C) Ultra filteration D) Glomerulus in the bowman's capsule
A) Distal tubule B) Urethra C) Bowman's capsule D) Henle's loop
A) Urbanisation B) War C) Poor storage facilities D) Overpopulation
A) Emigration B) Increased supply of a particular type of food C) Decline in the rate of reproduction D) Competition
A) Heat B) Parasites C) Water D) Space
A) Mortality B) Light C) Food D) Competition
A) Dispersal B) Limiting factor C) Environmental resistance D) Balance in nature
A) Prevention of indiscriminate abortion B) Promotion of maternal and mother's health C) Increased risk of STDs D) Prevention of population explosion
A) Cytoplasm B) Ribosome C) Contractile vacuole D) Endoplasmic reticulum
A) Neutralisation B) Osmotic pressure balance C) Concentration gradient D) Homeostasis |