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The Science of Classiﬁcation 4 WormLike Phyla
Submarine Hot Springs Ancient nautilus Class Cephalopoda
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adaptive radiation amphibians ancestors angiosperms annelids aquatic archaebacteria arthropods asexually bacteria birds body plan called Cambrian Carboniferous carnivores cells Cenozoic chelicerate chordate Class complex continents Cretaceous cyanobacteria cycle Devonian digestive dinosaurs diploid diverse diversified Division earliest early earth ecological eggs endothermic environments eubacteria eukaryotes evolution evolutionary evolved Figure fins fishes flatworms fleshy-finned flowering plants forms fossil record fungi gametes gametophyte genetic genus gills green algae groups habitats haploid herbivores Heterotrophic higher plants hominid humans hyphae insects intestine jaws Jurassic kingdom larvae living mammals mass extinction means Mesozoic metabolic million years ago modern molecules molluscs Monera mosses multicellular Ordovician organisms oxygen pairs Pangaea parasites period Permian photosynthetic phyla Phylum plants and animals predators primitive produce prokaryotes Proterozoic protists reproductive reptiles seed segments Senkarik sexual Silurian species sponges spores sporophyte structures Subphylum survive terrestrial tissues Triassic tunicates unicellular vascular vertebrates viruses