What type of rock forms when preexisting rocks undergo changes in response to a modification of their environment, without first melting? igneous rocks sedimentary rocks metamorphic rocks meteorites?

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.