Answer:
The statement is true.
Explanation:
During the first half of the 20th century, racism was extreme and constant in many countries. This racist thinking forced African American people to eat, drink, study and do everything in different places. Also, the only work they could do was housekeeping or physical work like construction.
Answer:
B. External respiration
Explanation:
Respiration means transport of oxygen to the cells within tissues, and the transport of carbon dioxide in the opposite direction.
Answer:
The red light is more advantageous.
Explanation:
Predators that are producing red light have advantage because they can see their prey but their prey can't see them,since most of them see blue light.
Some also light up their red light to attract mates.