Answer:
D
Explanation:
i got it right on study island
Answer:
Benefits:
In a lab, scientists can control the conditions according to their research and study. This allows them to focus on a single perspective.
On the other hand, in a natural setting there are complex interactions due to which focusing on a single attribute can be difficult.
Drawbacks:
Ina laboratory experiment, we cannot control every variable which might be having an effect on our concerned subject as compared to a natural setting. This is because lab experiments are performed in a controlled experiment. Hence, there might be difference of results in a lab experiment and nature.
All of them performs a function similar to that of the human body's skin!
Answer:
The answer is:
E. They lack a plasma membrane.
The reason is that the plasma membrane is actually a very important part of their cell. Hope that helps! :)
Positive selection of t cells occur in .the thymus
