44. Viruses are not in the classification system because they a. are obligate pa

Question

44. Viruses are not in the classification system because they a. are obligate parasites. b. are noncellular c. can integrate into the host genome. d. All of these are correct 45. Why can't cyanobacteria be classified with the eukarotic algae? a. they fix atmospheric nitrogen. b. They form a symbiotic relationship with fungi. c. They cause disease. d. They do not have a nucleus. 46. Volvox a. does not reproduce b. is a colonial alga c. produces daughter colonies d. both b and c are correct 47. which of these are not true of spirogyra? a. has a spiral chloroplast b. filamentous c. carries out conjugation d. reproduces asexually by forming spores 48. Which are true of euglenoids? a. they have flagella b. some have chloroplasts c. they reproduce asexually d. all of the above 49. Protozoans are not animals because they are: a. pigmented b. motile c. unicellular d. all of the above 50. Ciliates have a. have a macronucleus and a micronucleus b. do not move c. are parasitic d. are usually saprotrophic

Explanation / Answer

44. Correct answer:- (d) All of the above are correct.
Explanation- viruses are acellular, obligate parasite that integrate into host.
45. Correct answer:- (d) they don't have a nucleus.
Explanation:- Cyanobacteria are prokaryotic organisms, i.e. they lack nucleus.
46. Correct answer:-(d) both b and c are correct
47. Correct answer:- (d) reproduce asexually by forming spores.
48. Correct answer:- (d) all of the above
49. Correct answer:- (c) unicellular
50. Correct answer:- (d) are usually saprophytic

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