What statement most completely describes the primary role of the cell in a multicellular organism?
a. the collection of organelles interact with the environment to protect against environmental contaminants.
b. the internal structures provide shape and support to a variety of living organisms-both unicellular and multicellular.
c. they scientist classify all living organisms by the types of cells they are made of.
d. the combination of chemical functions and genetic material enable the cell and the organism to live, grow, and reproduce.

it has one origin of replication, but it proceeds in two directions - d)

i think the miocene epoch spans the time from 23 million to 12 million years ago.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.