Amammoth carving, deigned out of a horse's shoulder blade, was found in waters covering the ancient bering strait and land bridge. a 0.500 gram piece of the was observed to undergo 1187 carbon-14 decays in a 1-hour period.

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?