Which of the following can be used by scientists to date the sediment layer they are found in? select all that apply.

radioactive isotopes
fossils
tree rings
animal growth rings
mineral elements

need answers asap

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.

Hey everybody i need with a biology question. all the gametes of isogamous organisms are genetically identical. true false

Which best describes somatic mutations? they are usually passed on to offspring. they can cause different kinds of cancer. they always result from point mutations. they only occur in reproductive cell