Myofibril. Thick filaments consist of myosin, held in place by titin filaments
Answer:
Bonded to meteorites that hit the Earth
Explanation:
The<u> origin of water on Earth</u> is being linked to the existence of very old meteorites that have been found on Earth. The<em> "Carbonaceous chondrites," </em>which are meteorites, have a similar content to that of seawater. Its<u><em> isotope levels</em></u> for hydrogen and nitrogen are similar with <em>Earth's seawater</em>. They're believed to have come from the outer asteroid belt and later on delivered water to Earth after collision.
