During a cardiac arrest, or heart attack, blood flow to a person’s heart muscles gets cut off. Why is this such a huge problem? In your response: - Identify which substances the blood carries.
- Explain why those substances are necessary for the survival of the organism.
- Identify the process used to create energy in the body.
- Identify the cell structure that does this process.

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

Which sentence is an example of a strong conclusion to an autobiography? a. i stayed after school three days in a row to practice onstage in the auditorium. b. i knew i would have to practice all week to memorize my dance for the recital. c. after the recital was over, i knew practicing was worth it, and i was looking forward to my next big challenge. d. on opening night, i danced in front of a packed auditorium.

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?