MCQ: Biological classification

29. Which kingdom do all single-celled eukaryotes belong to?
a) Fungi
b) Animalia
c) Protista
d) Plantae

30. Which of the following organisms are included in the Protista kingdom?
a) Slime moulds and fungi
b) Eubacteria and Euglena
c) Chrysophytes and dinoflagellates
d) cyanobacteria and Protozoans

31. which of the following group acta as connecting link between other three group?
a) Fungi
b) Animalia
c) Protista
d) Plantae

32. What is the primary habitat of Chrysophytes, such as diatoms and golden algae?
a) Terrestrial forests
b) Arid deserts
c) Freshwater and marine environments
d) Underground caves

33.Diatoms are known for their indestructible cell walls made of:
a) Cellulose
b) Chitin
c) Silica
d) Calcium carbonate

34. How do Chrysophytes typically move within water bodies?
a) By actively swimming
b) By floating passively in water currents
c) By forming colonies
d) By attaching to substrates

35. Which of the following statements is true regarding Diatoms?
a) They lack cell walls.
b) They have cellulose cell walls.
c) They have calcium carbonate cell walls.
d) They have indestructible silica cell walls.

36. What is the commercial use of Diatomaceous earth, a product derived from Diatoms?
a) It is used as a source of food for aquatic organisms.
b) It is used as a building material.
c) It is used in the polishing and filtration of oil and syrup.
d) It is used as a fuel source.

37. In marine ecosystems, what role do Diatoms primarily play?
a) Apex predators
b) Decomposers
c) Primary producers
d) Secondary consumers

38. What is the primary habitat of dinoflagellates?
a) Freshwater
b) Terrestrial
c) Marine
d) Desert

39. What is the main structural component of the cell wall in dinoflagellates?
a) Chitin
b) Silica
c) Cellulose
d) Calcium carbonate

40. How many flagella do typical dinoflagellates possess?
a) None
b) One
c) Two
d) Three

41. What causes the phenomenon known as “red tide” in marine environments?
a) Rapid multiplication of red dinoflagellates
b) Accumulation of sediment in seawater
c) Rapid multiplication of red alagae
d) High levels of oxygen in the water

42. What is the primary habitat of Euglenoids?
a) Saltwater
b) Stagnant freshwater
c) Oceanic depths
d) Moist soil

43. Which of the following is NOT a characteristic of Euglenoids?
a) Presence of a cell wall
b) Two flagella
c) Photosynthetic in sunlight
d) Flexible protein-rich layer (pellicle)

44. In the absence of sunlight, Euglenoids act as:
a) Predators
b) Parasites
c) Heterotrophs
d) Decomposers

45. What is the primary method of movement for Slime Moulds?
a) Swimming using flagella
b) Crawling with pseudopodia
c) Gliding on a mucous surface
d) Rolling like a ball

46. What do Slime Moulds form when they aggregate and grow over decaying organic material?
a) Plasmodium
b) Lichens
c) Mycorrhizae
d) Algal blooms

47. Under adverse conditions, Slime Moulds can differentiate into:
a) Plants
b) Animals
c) Fruiting bodies with spores
d) Non of the above

48. How are the extremely resistant spores of Slime Moulds primarily dispersed?
a) Water currents
b) Animal vectors
c)Underground tunnels
d) Air currents