Ineed !

ribosomes are crucial proteins in cells because:
select one:

b. they provide the structural components of all cells.

c. they only operate in eukaryotic cells.
d. they are the sites for protein synthesis.

significant amounts of nitrogen oxides, carbon monoxide, and other pollution

explanation:

passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.