What was Marshall Nirenberg and Heinrich Matthaei's contribution to our current understanding of the genetic code?

discovery of codons

discovery and extraction of DNA

creation of a model of DNA

creation of Photo 51

How were the elements on earth initially formed

Explain how an agarose gel can separate DNA fragments of different lengths.

How does environmental change affect the survival of a species?

A book titled Reducing Fats In Your Diet is probly about A) carbohydrates B) lipids C) nucleic acids D) protiens

Which statement best describes the function of the mitochondria? A. They build and transport proteins. B. They allow for cellular motility. C. They provide an outside barrier to the environment. D. They assist with cellular respiration.

Discuss four ways a scientist can prevent bias in scientific investigations.

What Gives Directionality To Carbohydrates?

Invertebrates are the most commonly found fossils because they:

Recent studies have found traces of the insecticide DDT accumulated in the fat tissue of many wild animals. A correct explanation for this accumulation is that

Cell engulfs microorganisms in cell "eating": pinocytosis active transport phagocytosis passive diffusion facilitated diffusion