A scientist finds a piece of rock in a crater. He analyzes the rock and realizes that the composition is mostly of iron and nickel. He claims that he found a meteor. What is most likely the scientist’s error?

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

What is the role of dna ligase in the elongation of the lagging strand during dna replication?

49 ! how are energy cycles and growth cycles related?