Answer:
A
Explanation: You can see that the green colored frogs were once lower than the blue and as time started progressing the green started getting a higher population over the blue, as the blue decreased.
The answer is concentration gradient. Have a good day.
Answer:
Yes, vaccination should be mandatory because without it all of us would slowly died from not having a cure. According to research people, they said; "vaccination will helps you to stay healthy. It also are important to your overall health such as diet and exercise."
Explanation:
Answer:
the answer would be muscular coodination
and the cardiac muscles do not get rest
