Identify the incorrectly matched pair:
1. Diatoms: Chief producers in oceans
2. Dinoflagellates: Red tides
3. Slime moulds: Spores dispersed by water
4. Euglenoids: Protein rich pellicle
Identify the incorrect statement :
1. Heterotrophic bacteria are important decomposers
2. Diatoms are chief producers in the oceans
3. The pigments of Euglenoids are identical to those present in higher plants
4. Very few protozoans are autotrophs
Members of Kingdom Protista
1. are primarily aquatic
2. do not have membrance bound organelles
3. are all ciliated or flagellated
4. reproduce exclusively by asexual means
Match each item in Column I with one in Column II and select your answer from the codes given below:
Column I | Column II | ||
A. | Diatoms | a. | Protein-rich layer of pellicle |
B. | Dinoflagellates | b. | Cell wall embedded with silica |
C. | Euglenoids | c. | Spores with true walls |
D. | Slime moulds | d. | Cellulose plates in the cell wall |
Codes:
A | B | C | D | |
1. | b | a | c | d |
2. | b | d | a | c |
3. | b | c | a | d |
4. | b | a | d | c |
All the following statements regarding Basidiomycetes are correct except:
1. | The mycelium is branched and septate |
2. | Asexual spores and vegetative reproduction are generally not found |
3. | Sex organs are absent |
4. | Basidiospores are exogenously produced on the basidium |
Match the Scientists in Column I with their contribution in the field of virology given in Column II and select your answer from the codes given below:
Column I | Column II | ||
A. | Ivanowsky | a. | Recognized tobacco mosaic is caused by microbes smaller than bacteria |
B. | Beijerinck | b. | Demonstrated extract of infected tobacco plants could cause infection in healthy plants |
C. | Stanley | c. | Showed that viruses could be crystallized |
Codes:
A | B | C | |
1. | a | b | c |
2. | a | c | b |
3. | b | a | c |
4. | b | a | d |
The protozoans that cause malaria in humans are :
1. Radiolarians
2. Dinoflagellates
3. Chrysophytes
4. Sporozoans
What is true for both (a) and (b)?
1. RNA is the genetic material
2. Capability to infect bacteria
3. Being obligate endoparasites
4.Can be killed by antibiotics
Which of the following are found in extreme saline conditions?
1. Archaebacteria
2. Eubacteria
3. Cyanobacteria
4. Mycobacteria
Viroids differ from viruses in having
(1) DNA molecules with protein coat
(2) DNA molecules without protein coat
(3) RNA molecules with protein coat
(4) RNA molecules without protein coat