Riley is 3 years older than his sister. the sum of their ages if s represents riley's sister's age is shown as
a. 3s
b. b s + 3
c. 2(s + 3)
d. 2s + 3

Name the organs of humanelemintary canal.

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms

Will mark you as ! keiko’s teacher was discussing the theory of endosymbiosis. she asked keiko to mark the organelles in the diagram that most closely resembled prokaryotes. which organelles should keiko mark? * the first image is the question and the second image is some information to you answer the !