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