Answer:
Explanation:
The cell membrane, therefore, has two functions: first, to be a barrier keeping the constituents of the cell in and unwanted substances out and, second, to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.
Answer:
D. brain stem
Explanation:
i am 100% sure because I learned this last year! hope this helps!!
Answer:
formed when loose materials become pressed or cemented together of when minerals form from solutions
Hello. You forgot to enter the answer options. The answer options are in the figure attached below:
Answer:
the option D is the right answer.
Explanation:
Option D shows a pathway where activation of the receptor would lead to an increase in gene expression. This is because in this option we can see that the transcription regulator is decreasing gene expression, but there is a receptor that is activated and that has the ability to inhibit the pathway, allowing the selected gene to be expressed efficiently. This is because the pathway shows two inhibitory steps, when this happens an activation is performed.