what do this mean do you want free points
There are few donor lungs available.<span>In 2010, about 1,800 lung transplants were performed in the United States.
Brainliest please?</span>
Answer:
a. enclosing their DNA in a nucleus.
Explanation:
Prokaryotes in general have no membrane bound organelles. The cells are enclosed in a plasma membrane though .
b. trees provide everything in a rain forest ecosystem.
Atoms form new substances by sharing electrons with each other. the answer is most likely A.