921 The main nitrogenous waste formed in the body of earthworm is/are___________? Biology Medium Full question → A Ammonia B Urea C Uric acid D Trimethylamine oxide
922 Each ach nephridium of earthworm opens to the exterior by__________? Biology Medium Full question → A Nephrostome B Nephridiopore C Flame cell D Anus
923 Amount of water required to excrete 1gN of Urea is_________? Biology Medium Full question → A 1 ml B 50 ml C 100 ml D 150 ml
924 Purine and pyrimidine metabolism results in production of____________? Biology Medium Full question → A Creatinine B Trimethyamine oxide C Xanthine D None of these
925 Which of the following statement about conifers is correct? Biology Medium Full question → A Stored excretory products in vacuoles, at a concentration that leads to crystal formation. B Accumulate waste in leaves, which fall in autumn. C Production of black wood in the center. D Excrete some of the waste materials directly into soil, occasionally using them as a chemical weapon against other competing plants.
926 Which excretory product in produced in plants during autotrophic mode of life? Biology Medium Full question → A CO2 B H2O C O2 D Both A and B
927 Which of the following marine fishes are considered direct descendents of fresh water ancestors? Biology Medium Full question → A Hagfish B Jelly Fish C Star Fish D Bony fishes
928 Most of the marine invertebrates are__________? Biology Medium Full question → A Osmoconformers B Osmoregulators C Both depend upon the concentration of sea water D None of these
929 Which of the following represents osmoregulatory steps taken by hydrophytes? Biology Medium Full question → A Increases transpiration by increasing the surface area of the leave. B Small and thick leaves to decrease the surface area proportional to the volume of the leave. C Stomata closing in sufficient supply, and opening in restricted supply of water. D None of these
930 The mechanism of regulation, generally between organism and its environment, of solutes and the gain and the loss of water is called________? Biology Medium Full question → A Homeostasis B Hemostasis C Osmoregualtion D Thermoregulation
931 Fishes, most of the invertebrates and amphibians are examples of ________ animals? Biology Medium Full question → A Endotherms B Ectotherms C Heterotherms D Homeotherms
932 Formation of heat shock proteins in plants results in___________? Biology Medium Full question → A Elevation of temperature in cold conditions. B Embracing the enzymes and other proteins and prevent their denaturation. C Change the chemical nature of other proteins thus making them heat resistant. D Help in evaporative cooling.
933 Panting is a representative of which mechanism? Biology Medium Full question → A Pigmentation. B Respiration. C Evaporative cooling. D Excretion.
934 Brown fat present in certain mammals is specialized in___________? Biology Medium Full question → A Providing insulation in cold environment. B Providing insulation in hot environment C Rapid heat production. D Controlling heat production.
935 It has been estimated that in a normal person plasma constitutes about ________ by volume of blood. Biology Medium Full question → A 35% B 45% C 55% D 75%
936 Which of the following is true about hearts of earthworm? Biology Medium Full question → A There are 5-7 pairs of heart. B They are present between 1-7th segments. C They are present lateral to the oesophagus. D They pump blood from ventral to dorsal vessel.
937 Stomata open due to _________ of K+ into the guard cells from the surrounding epidermis Biology Medium Full question → A Diffusion B Active transport C Osmosis D All of these
938 Centric discoid form of diatoms is__________? Biology Medium Full question → A Diplaneis B Coscinodiscus C Camphyloneiscus D Stephanodis
939 Diatoms are found in__________? Biology Medium Full question → A Phytoplanktonic population B Freshwater lakes and ponds C Marine environment D All of the above
940 Which one of the following is representing the group of diatoms? Biology Medium Full question → A Pinnularia, Navicula, Cymbella, Melosira B Euglenamorpha, Hedneria , Heteronema, Colacium C Nostoc, Anabaena, Aulosira, Cylindrospermum D Cochlodinium, Gymnodinium, Lenodinium, Peridinium