Reptiles evolved from ________ ancestors and were abundant by the ________ period.
A. echinoderms; Cambrian
B. fish; Devonian
C. amphibians; Permian
D. mammals; Carboniferous
Answer: C
You might also like to view...
After organic molecules have been formed in abundance, what is the next step that must occur in the
progression toward a living organism?
a. evaporation of the water the organic compounds are dissolved in b. dehydration reactions linking macromolecule monomers into larger molecules c. increasing availability of organic compounds d. the formation of a semi-permeable membrane e. aggregation of the different organic compounds so all of the pre-cell building blocks are in the same localized region
In his voyage around the world in the Beagle,
what observation did Darwin make about animals?
a. animals in similar climate zones were similar regardless of where they lived b. animals isolated on islands were unlike any living on nearby mainlands c. animals living closer together appeared more closely related to each other than animals living further away d. fossils of animals he found were unlike any animals still living e. there appeared to be no genetic connections between any of the animals he observed
A species that has population levels so low it faces
extinction in all or part of its range is designated as a. riparian. b. endemic. c. endangered. d. fragmented. e. an indicator.
An anaerobic prokaryote engulfs a prokaryote capable of using oxygen to produce energy. The anaerobe could now perform
A) both photosynthesis and aerobic metabolism. B) aerobic metabolism. C) photosynthesis. D) only anaerobic metabolism.