A particular peptide has the following amino acid composition of (Lys, Phe, Met, Asp and Thr). The following experimental observations have been made. Trypsin yields 2 peptides with composition (Lys, Met, Asp) and (Thr, Phe) Cyanogen bromide cleavage gives 2 peptides with composition (Met, Asp) and (Lys, Thr, Phe). Chymotrypsin give 2 peptides with composition (Lys, Met, Phe, Asp) and (Thr). Trypsin cleaves at the C-terminus of Arg and Lys. Chymotrypsin cleaves at the C-terminus of aromatic residues. Cyanogen bromide cleaves at the C-terminus of Met. What is the amino acid sequence

Deer cave cannot support photosynthesis is as not enough sunlight is present. in spite of this, it still has a complex food chain. what is the energy foundation of this food chain?

To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)—two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.

The nursing instructor has been observing nursing students initiate an iv infusion. which action(s), if made by the nursing student, indicates that further instruction is needed? (select all that apply.) the nursing student: