PLEASE HELP List the 4 nitrogen bases for DNA.

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.

Blank is a rock with a find dark texture that makes up the oceanic crust

Based on the diagram, which of the following best describes ways in which the physical appearance of h. neandertalensis and h. sapiens differ?