6. If you were a tiny aquatic protist, what would you fear as a possible predato

Question

6. If you were a tiny aquatic protist, what would you fear as a possible predator? a) a ciliate b) a diatom c) a red alga d) a green alga 7. You see a very large protist in ajar ofocean water. You could be looking at a a) stramenopile b) red alga c) green alga d) a, b, and c e) none of the above 8. Which statement about biofilms would lose points on an exam a) Growth is due to signaling molecules recruiting cells. b) Cells secrete sticky proteins and polysaccharides. c) Damage to industrial equipment costs billions. d) Nutrients and wastes travel through channels. e) They are uncommon in nature 9. Which of the following traits do archaeans and cukaryotes share? a) presence of a nuclear envelope b) presence of peptidoglycan in the cell wall c) sensitivity to streptomycin d) presence of introns 10. Bacteria perform the following ecological roles. Which role typically does not involve symbiosis? a) skin commensalist b) decomposer c) gut mutualist d) pathogen

Explanation / Answer

6. Tiny aquatic protist fear from ciliate as predator. Because ciliates feed on protozoa.

So, the correct option is – a) a ciliate

7. The correct option is – d) a, b and c. Stramenophile, red algae and green algae.

8. The incorrect statement about biofilm is – e) they are uncommon in nature. Because they prevalent in nature.

9. Archaeans and eukaryotes share a common trait – sensitivity to streptomycin. Because both are sensitive to streptomycin but although their growth is not inhibited while responding to this antibiotic.

So correct option is – c) sensitivity to streptomycin

10. Bacteria perform the following ecological roles - skin commensalist, decomposer, gut mutualist, pathogen. Out of these roles decomposing does not involve symbiosis. Because during decomposition, organic matter is broken down and reduced to its original elements by bacteria. So, no symbiotic relationship occurs with the decomposing body.

So, the correct option is – b) decomposer

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