Someone please help fast! What information can tree rings give us about past climates?

Select 2 correct answer(s)

A. Past temperatures

B. Past cataclysmic events like asteroid impacts

C. Past precipitation levels

D. Past atmospheric CO2

What does homeostasis means in biology?

What are they five steps of cloning?

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.