Answer:
The smooth endoplasmic reticulum
Explanation:
Hope this helps :)
True
Explanation:
The statement that when the distance between the balls decreases, the size of arrow increases because it shows the gravitational pull between the two balls which increases is true.
According to Newton's law of universal gravitation:
"The gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to the square of their separation".
Mathematically, the law is written as:
F = 
F is the gravitational force
G is the universal gravitational constant
m is the mass of the body
r is the distances between them.
We see that the less the distance between the two bodies the more the gravitational force they have.
learn more:
Gravitational force brainly.com/question/1724648
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<span>Some of the first animals to develop an endoskeleton were: echinoderms.</span>
The information about the basic unit of structure and function in all living things can be revealed by the cell theory. It says that all living things are made of cells which is a basic <span>basic unit of structure and function. I am pretty sure it will help you, regards!</span>
I could come up with multiple examples!
•Coal
•Natural gas
•Nuclear energy
•Petroleum
Hope this helped!