Which is world’s most problematic aquatic weed?

Related MCQs

• Match the items given in column I and II Column-1 Column-II (P) Water accumulation in potted plant (i) Chemical fertilizers (Q) Aquatic weed (ii) Mercury,DDT (R) Eutrophication (iii) Eichhornia (S) Nonbiodegradable (iv) Water logging
• Give correct option for the given true and false statements (i) Some insects, birds and mammals living in warm and dry climate have more darker black pigments than the races of same species living in cold and humid climate. (ii) Tempreture variation is much lesser in aquatic habitat compared to terrestrial habitat (iii) In deep fresh water lakes, there is gradual incrase in tempreture from surface to the bottem (iv) In an aquatic habitat production increases with insing depth. (T =True, F = False)
• Which chemicals increase growth of aquatic organism?
• In which subdivision of aquatic ecosystem thermal stratification in seen ?
• In which of the following aquatic ecosystems habitat fluid (liquid) is very concetrated compared to body fluid ?
• The second largest aquatic vertebrate is (J & K CET-2008)
• When organism of aquatic ecosystem is at equvalent trophee level in when cow is included ? (DUMET...2009)
• Arrange the following statements with reference to accelerated eutrophication in proper manner. (p)Silt and debris pile up at the bottom of the lake (q)Marsh plants take roots in the shallows begin to fill the lake basin (r)Introduction of large number of nitrogen and phosphate in the pond (s)Encouragement of growth of aquatic organisms.
• Which is the most common Plasmid used for most of genetically engineered product ?
• Which statements are true. 1. At present there are 14 biosphere reserves in India. 2. Biospheres includes 3 zones. 3. Bandipur, Periyar, Kaziranga and Hazirabaugh are biosphere reserve 4. UNO has formulated the concept of biosphere reserve. 5. Core Zone is the inner most region of biosphere reserve.