Rivers, springs, and aquifers are all fresh water components of the hydrologic cycle. as this water progresses through the cycle, it will eventually into the atmosphere before and falling back to the earth as precipitation.

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

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.