How does convection occur in the troposphere?

A. The Sun's rays heat Earth's surface.

B. Warm air rises and cool air sinks.

C. The Sun's electromagnetic waves reflect off clouds.

Why do some codons code for the same amino acid as another codon? A. it is due to mutations. B. There are only 20 amino acids and 64 possible combinations C. Each codon is unique and they all code for different amino acids.

Should you NOT to protect your self from exposure to bloodnourne pathogens

What objetos dos Saturn circle and what are the made of

When gametes are produced from a parent cell during normal meiosis, which of the following describes the number of chromosomes in each cell resulting from this process? Select one: a. one-half the number of chromosomes as the parent cell. b.

What is found in all adult exhinoderms

What is the expected effect of hyperventilation on heart rate? why does this change occur?

In what ways are cellular respiration and fermentation alike? in what ways are they different?

Which best describes the process of editing a conclusion?

What are the sections of aquifers?

What is biodiversity?