Fossils of marine organisms high in the Andes Mountains led Darwin to which of these conclusions? A:Earth is 6,000 years old.

B:An earthquake had taken place.

C:Great change can happen over time.

D:Interspecific variation had taken place.

Talking listening and reacting non verbally are all part of communicating

Isotopes of the same element have differ in their

Which best describes a benefit of using dna technology in medicine? a) medicine can be produced in mass quantities. b) medicine can be distributed at a reduced cost. c) medicines have fewer side effects. d) medicines are resistant to antibiotics.