The arms of humans and the flippers of dolphins have a similar bone structure. so, they’re organs. the legs of a kangaroo and the legs of a jumping spider allow both organisms to jump. however, spiders are invertebrates, and kangaroos are vertebrates. this difference makes their legs structures.
1)a. analogous b. homologous c. vestigial
2)a. analogous b. homologous c. vestigial

answer: c.

explanation:

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.