Answer: it's because they need to provide a lot of energy.
Explanation: fat cells have many mitochondria because they store a lot of energy. Muscle cells have many mitochondria, which allows them to respond quickly to the need for doing work.
B. Crystalline structure
C. Types of chemical elements
And
D. Amounts of chemical elements
Fastest is o over a hundred knots per hour slowest is from under one knot per hour
The statement which best explains why carbon is present in so many kinds of molecules is because <u>it can form four covalent bonds.
<em /></u>It isn't rare on Earth, so A is incorrect. It has valence electrons, so C is incorrect. It cannot become an ion, so D is incorrect.<u>
</u>
Answer:
A
Explanation:
Blow flow in the capillaries is slowest despite the large surface area. This is to allow for exchange of gases and nutrients at the cellular level.
