Im like 98% sure its B because ultra sounds hear the frequency's of the baby in the womb
C. Cells
Cells make up organs, which make up organisms, which make up populations
When population don't change very much over time, the ecosystem is in equilibrium.
Answer:
It also provides an extremely stable backbone with the negatively charged phosphates pointing to the outside of the molecule. This charge aids in the attachment of other molecules to the strand of DNA. DNA double helix allows it to be stable and it won't easily destroyed.
