Before the evolution of life produced the process of photosynthesis, small amounts of oxygen were added to the earth's atmosphere by the process of

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 of the following is a consequence of urban heat islands? increased precipitation downwind of the city? increased precipitation upwind of the city? decreased winds within the city? increased winds within the city?

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays