Causing the Great Oxygenation Event and the "rusting of the Earth", which of the dramatically changed the composition of the Earth's life forms and led to the near-extinction of anaerobic organisms?
1. Cynobacteria
2. Diatoms
3. Dinoflagellates
4. Green algae

The human use for lichens include:

I. as a food source
II. in lichenometery
III. as dyes

1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III

If you are told that the given diagram shows a single ‘super cell’ that can ‘move’, you would conclude that this must be:

1. A plasmodial slime mould
2. A pathogenic fungus
3. A coenobium of an alga
4. A bioluminescent dinoflagellate

The unusual red color of water that you see in the picture will most like be due to:

Identify the organism shown in the figure and the function of the structures shown by arrow:

1. Paramoecium, trophic functions
2. Euglena, sexual reproduction
3. Paramoecium, osmoregulation
4. Euglena, photoreception

A phage with the following life cycle will be called as:

1. Temperate
2. Virulent
3. Prophage
4. Prion

Consider the given statements regarding cynobacteria [blue green algae]:
I. Some cyanobacteria can fix atmospheric nitrogen in aerobic conditions by means of specialized cells called heterocysts.
II. Cyanobacteria such as Anabaena (a symbiont of the leguminous plants) can provide rice plantations with biofertilizer.
III. Many cyanobacteria form non motile filaments of cells, called hormogonia during unfavorable conditions
The incorrect statements are:
1. None
2. Only I and II
3. Only III
4. I, II and III

The following diagram shows:

1. Asexual reproduction in lichens
2. Size restitution in diatoms
3. Formation of cellulose plates in dinoflagellates
4. Sporogony in malarial parasite

The given diagram shows the formation of:
  

1. Conidia on sporangiophores
2. Ascospores on asci
3. Basidiospores on a basidium
4. Conidia on conidiophores

Which of the following will be the virus for which the typical life cycle would be as shown in the given figure?

1. Reovirus
2. Rotavirus
3. Arbovirus
4. Retrovirus