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