Answer:
I would think Channel proteins but I could be wrong
Answer:
D the train
Explanation:
The train is safe very fast and was the first built
Answer:B animals will die since there arent enough resources for everyone until there is enough for the remaining population to use
Sildenafil, also known as viagra, treats <span>erectile dysfunction.
</span>Isosorbide dinitrate- is used to treat or prevent angina.
They both dilate blood vessels, making it easier for blood to flow.
This drugs taken together are not recommended because it may cause blood pressure to fall
excessively, which can lead to cardiovascular collapse.
Other side effects are: dizziness, fainting,
headache, heart palpitations, and priapism (prolonged and
painful erection)
