Which of these observations does NOT provide evidence for the heliocentric model of our solar system? Planets move in elliptical orbits.

Comets move in regular, elliptical orbits.

Venus shows phases, just like the Moon.

Earth's gravitational pull keeps its moon in orbit.

hi my name is ashlynn and im 15

these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.