The Sun is the center of our solar system, which includes planets, dwarf planets, asteroids, and comets. Which
statement best explains why all objects, including planets, orbit the Sun, instead of the Sun orbiting one or more
planets?

Planets are further from the center of the solar system.

The Sun rotates faster than any of the planets.

Planets have less mass than the Sun.

The Sun formed before the planets or other objects.

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b.diffusion c. endocytosis d. exocytosisc. endocytosis

How does food concentration affect yeast activity

1. an enzyme is considered a(n) because it speeds up a chemical reaction without being used up.2. in a catalyzed reaction, a reactant is often called a(n) . an enzyme is specific because the shape of its matches only particular reactants.4. an enzyme speeds up reactions by lowering the . the between an active site and its substrate often strains bonds and the reaction proceed.6. a( , which is often a vitamin, binds to an enzyme and plays a role in catalysis.7. high temperatures or changes in ph can an enzyme, causing it to lose its shape and biological activity.