By taking an example of any ecosystem arrange the functions given below in correct sequence.
(i) Heterotrophs die and accumulate as organic material. (ii) Heterotrophs consume autotrophs.
(iii) Autotrophs convert inorganic material.
(iv) Decomposers decompose organic material
(v) Nutrients are released in the soil and reused by autotrophs.

Choose the correct answer from the choices given under each bit/Give one word answer only. Biotic components of an ecosystem includes (i) only producers (ii) producers and consumers (iii) producers, consumers and decomposers (iv) only consumers

The narrowly utilitarian arguments for biodiversity conservation include which of the following from the given list? (i) Industrial products like dyes, lubricants (ii) Ecosystem services like photosynthesis (iii) Pollinators layer of bees, birds and bats (iv) Firewood, fibre and construction material (v) The aesthetic pleasure of walking through thick woods (vi) Products of medicinal importance (vii) Watching spring flowers in full bloom (a) (i), (ii), (v) and (vii) (b) (ii), (iii), (v) and (vii) (c) (i), (iv) and (vi) (d) (ii), (v), (vi) and (vii)

Which of the following statements is/are incorrect ? (i) Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial habitats. (ii) Anabaena, Nostoc and Oscillatoria are photosynthetic N_(2) -fixing cyanobacteria. (iii) Tolypothrix (BGA) can increase rice production by about 20% (iv) BGA add organic matter to the soil and increase its fertility. (v) In our country, biofertilisers are not available commercially in the markets for farmers.

Carbohydrates are commonly found as starch in plant storage organ . Which of the following five properties of starch (i-v) make it useful as a storage material ? (i) easily translocated (ii) chemically non-reactive (iii)easily digested by animals (iv) osmotically inactive (v) synthesized during photosynthesis The useful properties-are:

Study the given flow chart and select the correct statement regarding this. (i) It represents phosphorus cycling in a terrestrial ecosystem. (ii) It represents phosphorus cycling in an aquatic ecosystem. (iii) Natural resenvoir of phosphorus is phosphate rocks. (iv) There is no repiratory release of phosphorus into atmosphere. (v) Gaseous exchange of phosphorus between organisms and enviornment occurs to a considereable extent.

Study the following statements and select the incorrect ones. (i) Pyramids of energy and yearly biomass production can never be inverted, since this would violate the laws of thermodynamics. (ii) Pyramids of standing crop and numbers can be inverted, since the number of organisms at a time does not indicate the amount of energy flowing through the system. (iii) There are certain limitations of ecological pyramids such as they do not take into account the same species belonging to two or more trophic levels. (iv) Saprohytes are not given any place in ecological pyramids even though they play a vital role in the ecosystem.

A 'type' is one particular specimen (or a group of specimens) of an organism to which the scientific name of that organism is formally attached. Match colum I (type) with colum II (description) and select the correct option from the codes given below. {:(,"Colum I",,"Column II"),(A.,"Holotype",(i),"A specimen cited with original description other than the holotype or isotype"),(B.,"Isotype",(ii),"A duplicate of the holotype"),(C.,"Paratype",(iii),"A specimen designated in the original designated in the original description"),(D.,"Lectotype",(iv),"A specimen selected from original material to serve as nomenclatural type when the holotype was not designated"):}

Match column I with column II and select the correct option from the codes given below. {:(,"Column I",,"Column II"),(A.,"RER",(i),"Intracellular and extracellular digestion"),(B.,"SER",(ii),"Lipid synthesis"),(C.,"Golgi complex",(iii),"Protein synthesis and secretion"),(D.,"Lysosomes",(iv),"Moves materials out of the cell"):}