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