An elements has two or more atoms with the same number of protons but different number of neutrons it is called a(n)
isotope
neutron
electron
none of the above

Skulls of (1) modern gorilla, (2) australopithecus afarensis, (3) homo erectus, (4) homo neanderthalensis, (5) homo sapiens based on the diagram, which of the following best describes ways in which the physical appearance of h. neandertalensis and h. sapiens differ? (2 points)

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.

Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance