Answer:
The heart
Explanation:
A hummingbird's heart is probably the biggest heart in the whole animal kingdom. A hummingbird's heart is very big compared to its weight
Regular physical activity can improve<span> your muscle strength and </span>boost<span> your</span>endurance<span>.</span>
The answer is C. 60 % Carbohydrates, 30 % fats, and 10 % protein
Athletes consumes a lot of energy. Which mean that they need their major source of energy should be fast to digest, which is Carbohydrates. Even though protein is really good to build muscle, it does not provide enough energy for athletes.
Yo, the correct answers are A. Prokaryote lacks a well the defined nucleus and C. Prokaryote lack cell organelles. I'm 100% sure about this :)