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