Which of these correctly lists the stages of development of the inner planets? a. inner planets ® protoplanets ® heavier elements ® planetesimals b. protoplanets ® planetesimals ® inner planets ® heavier elements c. heavier elements ® planetesimals ® protoplanets ® inner planets d. planetesimals ® heavier elements ® inner planets ® protoplanets

Which list is in order from simplest to most complex? a bacteria - virus - plant - protist b protist - bacteria - virus - plant c virus - bacteria - plant - protist d virus - bacteria - protist - plant

Which of these is not a nucleotide base found in dna?

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.