Yhdisteita) Stanley Miller and Harold Urey were the first to demonstrate that

A. the earliest genetic material was RNA, rather than DNA.

B. meteorites contain amino acids, many of which exist on Earth.

C. Earth formed from a nebula approximately 4.6 billion years ago.

D. organic molecules can be formed from inorganic molecules.

What is thought to have caused the mass extinction at the end of the cretaceous period?

Some technological solutions to problems like global warming meet the specific needs and situations of local communities. an example from india involves converting the solid waste from cattle into clean-burning fuel for cooking. this reduces the amount of greenhouse gases, specifically methane and carbon dioxide, released into the environment from wood fires. when evaluating the feasibility of implementing this solution, computer models are used to weigh costs against benefits. what factor is least likely to impact the decision on adopting this technology?

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.