the heart has valves in place to prevent the backflow of blood.
Answer: 1. True
2. Between six and right hours
Explanation:
1. Energy simply refers to the ability to do work. It's the strength that's required to be able to sustain a mental or physical activity.
It should be noted that fir positive interaction, energy requires physical activity, a balanced diet, adequate sleep, satisfying work and opportunities. Therefore, the statement is true.
2. Even though the hours of sleep that's used by people typically varies, adults generally need about six to eight hours of sleep.
Answer:
I believe it is Moelcule 2 but I may be wrong
Explanation:
Molecule 1 shows things related to ATP, and DNA is made with Ribosomes. So one can assume it's 2
They are going to reproduce so that their genes will pass on to the next generation, therefore more of the species surviving. Also, they all share the same gene that allows then to survive in their setting.
