Which of the following organisms are known as chief producers in the oceans?

• Dinoflagellates

• Diatoms

• Euglenoids

• Cyanobacteria

112.

Ciliates differ from all other protozoans in

• using flagella for locomotion

• having a contractile vacuole for removing excess water

• having two types of nuclei

• using pseudopodia for capturing prey

 Match the following with correct combination.

Column I	Column II
A. Cuscuta	1. Saprophyte
B. Eichhornia	2. Pneumatophare
C. Monotropa	3. Insectivorous plant
D. Rhizophora	4. Parasite
E. Utricularia	5. Root pocket

• A	B	C	D	E
  3	1	5	4	2

• A	B	C	D	E
  2	3	1	5	4

• A	B	C	D	E
  4	3	1	5	2

• A	B	C	D	E
  4	5	1	2	3

Diatomaceous earth is obtained from

• Bacillarophyceae

• Xanthophyceae

• Rhodophyceae

• Chrysophyceae

Thermococcus, Methanococcus and Methanobacterium are groups of

• Bacteria containing a cytoskeleton and all membrane-bound organelles

• Archaebacteria with peptidoglycan in their cell wall

• Archaebacteria that consists of protein homologous to eukaryotic core histones

• Most advanced type of bacteria

Nucleic acid is absent in

• Virus

• Viroid

• Prion

• Mycoplasma

Which part of an animal virus is not reproduced in multiple copies?

• Capsid

• Protein

• Envelope

• Ribosome

Entamoeba histolytica differs from Amoeba in absence of 

• pseudopodia

• contractile vacuole

• nucleus

• ectoplasm

Most primitive member, in which roots are not present, is

• Psilotum

• Rhynia

• Lycopodium

• Selaginella

The process which cannot take place in the absence of viruses is

• transformation

• conjugation

• translocation

• transduction