Aphylogenetic tree constructed using sequence differences in mitochondrial dna would be most valid for discerning the evolutionary relatedness of: a) chimpanzees and humans. b) sharks and dolphins. c) mosses and ferns. d) archaeans and bacteria. e) fungi and animals.

Study the diagram of a cell. which structure is found only in plant cells and functions in the process of photosynthesis? w x y z

9. the history of life on earth is recorded in

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.