21. A have two very different types of nuclei within their cells, small micronuc

Question

21. A have two very different types of nuclei within their cells, small micronuclei and larger A. sporozoans B. protists C. oomycetes D. ciliates E. dinoflagellates 22. The parasite that is responsible for causing malaria is called A. Streptococcus. B. Ch C.Plasmodium D. Entamoeba. E. Giardia. 23. Protists are classified into a single kingdiom because of which of the following features? A. They are eukaryotes, but not fungi. plants, or animals B. They are microscopic. C. They are unicellular D. All types of nutritional modes are found E. They are monophyletic. 24. Which of the following is not true about Eugiena? A. belongs to the same phylum as Paramecium 8. does not have flagella C. has a pellicle D. has numerous chloroplasts with chlorophyl a and b E. does not have sexual reproduction 25. Trypanosomiasis is spread by A. mosquitoes B. airborne droplets. C. tsetse flies. D. fleas on rats. E. contaminated water. 26. Vacuoles for ingesting food and regulating their water balance are characteristic of A. sporozoans B. trypanosomes C.cillates D. algae 27. Some photosynthetic euglenoids can also ingest dissolved or particulate food. Which one of the following terms would best describe such a protist? A. autotrophic B. heterotrophic E. spirochetes C. mixotrophic D. osmotrophic phagotrophic

Explanation / Answer

21. The answer is D) Ciliates.

Of both these nuclei, macronuclei is responsible for protein transcription and the macronuclei is responsible for exchange of genetic material during conjugation.

22. The answer is C) Plasmodium.

There are 5 species of plasmodium which are know to cause malaria. They are P. vivax, P. falciparum, P. ovale, P. malarie and P. knowlesi.

23. The answer is A) They are eukaryotes, but not fungi, plants or animals.

These are primitive organism and does not fit in any other kingdom.

24. The answer is B) Does not have flagella.

Euglena have two flagella which are rooted in the basal bodies. One flagella is longer as compared to the other one.

25. The answer is C). Tsetse flies.

These flies are found in sub-saharan Africa and is the spreading vector for trypanosomiasis.

26. The answer is C) Ciliates.

Contractile vacuoles generally have a role in water balance.

27. The answer is C) Mixotrophic.

Autotrophs are producers and can produce energy on their own. Heterotrophs obtain their energy from autotrophs. Phagotophs are heterotrophs which feeds by ingesting other organisms or organic particles.

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