Answer:
lysosomes
Many components of the cell eventually wear out and need to be broken down and the parts recycled. This activity takes place inside the cell in specialized compartments called lysosomes.
Answer:
B
Explanation:
competing with stronger organisms makes it difficult for the squirrel to be invasive
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Answer:
The correct answer is option c. "Enzyme lowers the activation energy".
Explanation:
The activation energy is defined as the amount of energy needed for a reaction to take place. Enzymes catalyze reactions by lowering the activation energy, which speeds up the reaction and increases its rate. Enzymes put a substrate in its active site, which facilitates the reaction and makes more likely that it collides with its subsequent substrate.
Astronomers have seen stars forming within a nebular cloud. As the nebular cloud condenses and its own gravitational attraction collapses it, heat and energy build up creating a planet.