Describe the advantages of a four chambered heart compared to heart with two or three chambers

What is the difference between an igneous, sedimentary and metamorphic rock

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.

What are the pros and cons of quadrat sampling?