With respect to thermoregulation, birds are:

endotherms

Explanation:

they are warm blooded and regulate their internal temperatures internally.

this protocol provides a detailed procedure for agarose-based ip to purify and enrich the protein of interest.

the framers of the constitution insisted that federal judges be nominated instead of elected due to their desire to have judges above the shifting whims of the masses.

the hope, whether achieved or not, was that federal judges would only be beholden to the law and that by not having judges be elected, they would be protected if that law dictated an outcome that ran counter to popular opinion.