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