Examlex
A major difference between exploratory and descriptive research is that exploratory research is characterized by the prior formulation of specific hypotheses.
Silurian Period
A geologic period and system that extends from about 443.8 million to 419.2 million years ago, noted for significant biological developments including the appearance of the first clearly identifiable land plants.
Air-breathing Animals
Organisms that intake oxygen from the air to the lungs or other special respiratory organs to sustain life.
First Land Animals
Early terrestrial organisms, primarily arthropods and amphibians, that colonized land during the Paleozoic era.
Arthropods
Invertebrate animals with exoskeletons, segmented bodies, and jointed limbs, including insects, arachnids, and crustaceans.
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