CH 12 End Of chapter Questions

How many phyla are represented in the following list of organisms: Echinococcus, Cyclospora, Aspergillus, Taenia, Toxoplasma, Trichinella?

D.4

Put the preceding stages in order of development, beginning with the egg

1.metacercaria

2.redia

3.adult

4.miracidium

5.cercaria

4, 2, 5, 1, 3

If a snail is the first intermediate host of a parasite with these stages, which stage would be found in the snail?

2. redia

Fleas are the intermediate host for Dipylidium caninum tapeworm, and dogs are the definitive host. Which stage of the parasite could be found in the flea?

cysticercus larva

Which of the following statements about yeasts are true?

1,2,3,4 (Yeasts are fungi;. Yeasts can form pseudohyphae; Yeasts reproduce asexually by budding; Yeasts are facultatively anaerobic

Which of the following events follows cell fusion in an ascomycete?

ascospore formation

The definitive host for Plasmodium vivax is

Anopheles

These are obligate intracellular parasites that lack mitochondria.

Microsporidia

These are nonmotile parasites with special organelles for penetrating host tissue.

Apicomplexa

These photosynthetic organisms can produce neurotoxins.

dinoflagellates