Answer:
the trend that favor the more leaning curve from the explanation
Answer: adult tissues
Explanation: Adult stem cells. These stem cells are found in small numbers in most adult tissues, such as bone marrow or fat. Compared with embryonic stem cells, adult stem cells have a more limited ability to give rise to various cells of the body.
To prevent blood flowing back after each heartbeat. They ensure that the blood flows only in one direction (back to the heart).
It would be the nuclear membrane
