An electron Microscope...................
Answer:
option D - Nucleic acid
Explanation:
Nucleic acids, macromolecules made out of units called nucleotides, come in two naturally occurring varieties: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Blood reticulocyte counts provide information regarding rate of erythrocyte formation.
Oil spills, littering, global warming. global warming !!!
Answer: B
Explanation: Mars and Venus are terrestrial so a planet in between would be as well