What are autotrophs? 

What are autotrophic bacteria?

Assertion: In most ecosystems, green plants are autotrophs. Reason: They have chlorophyll, which enables' them to produce carbo-hydrate from simple inorganic components.

Photosynthesis converts energy X into energy Y. (a) What are X and Y ? (b) Green plants are autotrophic in their mode of nutrition. Why?

Plants are autotrophic. Can you think of some plants that are partially heterotrophic?

How many organisms in the list below are autotrophs? Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyce Trypanosoma, Porphyra, Wolffia

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.

What is variation? What are its types?

What are nitorgenous bases? What are the types?