4. What kind of molecules carry the instructions for protein synthesis?

a. DNA and RNA

b. Amino acids

c. Lipids and carbohydrates

d. Enzymes

Why might a scientist use a model to study plate tectonics and the rock cycle?

What is the weather of a certain area over a long period of time?

Why do guys get hemophilia more then girls?

How have humans affected their environment over time?

What is a independent variable in science?

What converts energy from sunlight to chemical energy in a cell?

What is the difference between elements compounds and mixtures

ALSUM genes d. sex chromosomes 47. Down syndrome is characterized by having an extra copy of at least a portion of chromosome 21. Which of following methods would quickly identify the disorder? a. Pedigree chart c. meiosis map b. Karyotype d.

For what percentage of time has life existed on earth round to the nearest whole number

What does this similarity at the molecular level in yeast and humans most likely indicate