Question 1 :
Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms. <br>(i) Methanogens are archaebacteria which produce methane in marshy areas. <br>(ii) {tex} Nostoc{/tex} is a filamentous blue-green alga which fixes atmospheric nitrogen. <br>(iii) Chemosynthetic autotrophic bacteria synthesize cellulose from glucose. <br>(iv) Mycoplasma lack a cell wall and can survive without oxygen. <br>The correct statements are

Question 4 :
True fishes possess gills and fins. Which of the following is not a true fish

Question 5 :
{tex} \mathrm{Assertion}{/tex}: Sporozoans may have silica shells on their surface. <br>{tex}\mathrm {Reason}{/tex}: Shells of sporozoans render protection from acidic environment of the host.

Question 6 :
Classification systems serve four important roles. Which of the following is not one of those roles?

Question 10 :
Match Column - I with Column - II and select the correct option from the codes given below.<table><tr><td>Column -I </td><td>Column -II </td></tr><tr><td>A. Monera </td><td>(i) Chlamydomonas, Solanum </td></tr><tr><td>B. Protista </td><td>(ii) Bacillus, Oscillatoria </td></tr><tr><td>C. Fungi</td><td>(iii) Euglena, Trypanosoma </td></tr><tr><td>D. Plantae </td><td>(iv) Mucor, Penicillium </td></tr><tr><td>E. Animalia </td><td>(v) Felis, Panthera</td></tr></table>

Question 12 :
One example of animals having a single opening to the outside that serves both as mouth as well as anus is:

Question 14 :
Caulimo virus (Cauliflower mosaic virus) are a group of viruses which have