<span>One in every billion nucleotides replicated will be prone to mutation.</span>
Water vapor releases energy by through evaporation. None of your options are correct, buddy.
Valves are structures that allow for one-way blood flow through the heart.
I believe the process of fossilization still occurs today. The reason being why we find fossils is because of the overlaying of earth's substances over the fossil, and with the right combination, lead to fossils. It would still occur today, let's say you've buried a dog, and over time water, smelted rock, and a few other earth materials came over the dead dog's body. It would most likely be fossilized at the end of this process, but it would take years for it to happen. Fossilization does not happen in one day.
Answer:The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
Explanation: