Answer:
"Macrophages" cells are commonly dispersed (mixed in) with simple columnar epithelial cells. They are responsible for secreting mucus.
Explanation:
On a time graph the line will be flat. on a distance the line will increase at a predictible rate
Answer:
Black
Explanation:
The paper absorbs light of all visible wavelengths.
No visible light is reflected.
The paper will appear black to human eyes.