Answer:
In the bloodstream
Explanation:
The metabolic breakdown of amino acids creates ammonia, which is especially toxic to the brain. The liver converts ammonia to urea, and it is then released into the bloodstream, where it travels to the kidneys and is excreted in the urine.
They begin to form about 3.8 billion years ago
Answer:
(a) energy source, either sunlight or chemicals
Explanation:
They attach to the centromeres and pull apart new chromosomes to the opposite poles of the cell
Explanation:
I would answer but you don't make sense
