It would be difficult to find the ideal CO2 level with a low light intensity because the plant will have a difficult time trying to survive.
Answer:
no freaking clue buddy that looks made up
Explanation:
ion know
Im almost certain the answer is D but theres a chance I might be wrong
Answer:
The body has two lines of natural defense to protect against infection. The first are physical barriers, such as the skin, body secretions and mucous membranes. The second line of defense is the immune system. Specialized immune cells coordinate and execute attacks to kill germs that make it past the body's physical barriers.
