Answer:
about 5 billion years ago
Explanation:
Our solar system formed about 5 billion years a go from a dense cloud of interstellar gas and dust.
Bone marrow baby is a baby from a women that is equal to a monkey
Answer:
A
Explanation:
Because there are two DNA strands in the DNA molecule and they both rotate around each other in a helix formation. So two helixes = double helix.
A positively charged ion is called cation.
A negatively charged ion is called anion.
A salt is formed by the ionic bonding of a cation and an anion.
pH is a measure of the hydrogen ion concentration in a solution.
