Answer:
Venus and Mercury are the only planets in our solar system that do not have moons. Venus and Mercury have a gravitational pull that is weaker than the gravitational pull of the Sun, so they wouldn't be able to hold onto their own moon.
The answer is internal energy.
To be honest I got done with using a microscope about a month ago but if you want answers i'd just search it up online
Answer:
Explanation:
nucleic acid is a polymeric macromolecule made up of repeated units of monomeric 'nucleotides' composed of a nitrogenous heterocyclic base which is either a purine or a pyrimidine, a pentose (five carbon) sugar (either ribose or 2′-deoxyribose), and one to three phosphate groups.
Answer:
the virus undergoes genetic changes
