zs. which of the following has a domina sporophyte generation and a A mosa a) A
ID: 3166127 • Letter: Z
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zs. which of the following has a domina sporophyte generation and a A mosa a) A ferm C) A D) A conifer E) None of the cholices are conect 26. Which one of the folowing is NOT a member of the Domain Bacteria? A) proteobacteria a) gram-positive bacteria C) methanogens DJ spirochetes E) chlaimydias 27. Which one of the following is NOT a characteristic of cridarians A) Cniderians have three true tissue layers B) The digestive compartment of cniderians is called gastrovascular cavity C) The more stationary cnidarian body type, which is cylindrical with a ring of tentacles is the Polyp O) The cnidarian body type that is able to move about freely in the water is a medusa E) Cnidarians are named for their special stinging cells called cnidocystes A) planara C) sea anemone 28. Which one of the following animals has no digestive tract of any sort? D) tapeworm E) fluke 29. Which one of the following is NOT characteristic of flatworms? A) no anus B) habitat includes marine freshwater, and damp terrestrial environments C) a highly branched gastrovasular cavity D) members of the phyla include planarians, flukes and tapeworms E) radial symmetry 30. Mitochondria are descendants of alpha proteobacteria. They are, however, no longer able to most genes originally present on their chromosome are now use located in the nuclear genome. What phenomenon most directly accounts for the movement of these genes? A) Horizontal gene transfer B) Binary fission C) Conjugation D) Meiosis E) PlasmolysisExplanation / Answer
25. B. A fern
A fern has dominant sporophyte generation and a free-living gametophyte generation called prothallus.
26. C. Methanogens.
Methanogens belong to domain Archaea.
27. A. Cnidarians have three true tissue layers.
Cnidarians have two tissue layers, ectoderm and endoderm.
28. D. Tapeworm
Tapeworms lack digestive tract as they eat pre-digested food.
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