The half-life of 14C, a radioactive isotope of carbon, is approximately 5,700 years. The ratio of 14C to 12C in a fossil 30,000 years old would be that of a living organism today

If a set of instructions that determines all of the charactersitics of an organism is comparedto a book,and a chromosme is compared to chaper in the book,then what might be compared to a paragraph in the book?

Witch type of microscope is used to view very small cell components like proteins and dna?

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations