Because of gravity’s pull towards earth, and because of maximum velocity.
Answer:
Perhaps try adding a conflict? If a story's all happy-go-lucky, it won't draw the reader's interest. For example,
- Sabotage by a so-called friend
- Becoming I'll
- Group Project
- Being given an assignment that you're scared to do (for example, public speaking.
Answer:
Enzymes can only be used once
Explanation:
Enzymes are there forever
Answer:
cells consist of cytoplasm enclosed
with a membrane
