Answer:
A circle is a closed curved shape that is flat. ... Instead of having all points the same distance from the center point, though, an ellipse is shaped so that when you add together the distances from two points inside the ellipse (called the foci) they always add up to the same number.
Explanation:
Answer: Memory B cells
Explanation:
Memory B cells remember the same pathogen for faster antibody production in future infections.
Answer:
A
Explanation:
The respiratory system allows for gas exchange, water and heat balance, and creation of sound and speech. I just took quiz and this 1 was right.
