Answer:
1920s and 1930s,
Explanation:
it's worth reiterating that helmets were not mandatory. That wouldn't happen until 1943. During the 1920s and 1930s, variations of the leather helmet appeared, but in 1939, the game changed –or at least became safer– when John T. Riddel introduced the first plastic helmet
Answer:
Yes, the red blood cell swells
Explanation:
The red blood cells placed in a hypotonic solution will take in water across their membranes.
A red blood cell will swell and undergo hemolysis (burst) when placed in a hypotonic solution.
The red blood cell that is hypotonic (lower concentration outside the cell) will result in more water flowing into the cell than out. This results in swelling of the cell.
Answer:
B) material culture is the answer
Answer: Communication
Explanation:
The characteristic of a healthy family relationship does this described here is communication.
Communication is when information is being transferred from one individual to another individual or from one place to another.
For every communication, there must be a sender and a receiver to receive the message that's sent.
Answer:
6 year
Explanation:
assuming that the mother is 30 and erica is 12
give brainliest please I need it to level up
