Mudskippers are tropical fish that spend much of their time on land, but have gills rather than lungs or other air-breathing adaptations. Diving beetles spend a substantial amount of time underwater, yet lack gills or other adaptations to breathe underwater. Explain how both are able to live in and out of water.
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4.
The chordates share several features which have played asignificant role in the evolution of the phylum. Check all of thefeatures that one would use to exclusively classify members ofChordata and not members of Echinodermata.
a postanal tail during embryonicdevelopment | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
pharyngeal pouches during embryonicdevelopment | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
an endoskeleton | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
a notochord on the dorsal side ofthe gut in the early embryo | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
deuterostomic development of theembryo | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
a hollow nerve cord 5. A number of major evolutionary innovations arose in the fishlineage. Check all of the evolutionary innovations associated withthe fishes.
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1. Select the true statements concerning tracheids.
Tracheids are responsible foranchoring the plant to a substrate. | |
Pterophytes lack tracheids but haveeuphylls. | |
Without tracheids colonization ofland would not have been possible. | |
All of the large dominant extantland plants are tracheophytes. | |
Tracheids allow for efficienttransport of water over longer distances. |
2. Plants lacking well-developed conducting systems such asmosses, liverworts, and hornworts have been called
sporophytes. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
bryophytes. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
gymnosperms. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
gametophytes. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
angiosperms. 3.Select the true statements concerning gametophytes andsporophytes.
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