Answer:

Explanation:
The phospholipid bilayer is also known as the cell membrane. It covers cells and regulates the transport of substances. Certain ones can pass and others cannot, depending on certain factors like size and polarity.
Smaller substances tend to diffuse or move across the membrane quite easily. However, larger molecules have a much harder time. Many depend on special proteins embedded in the membrane. These are called transport proteins and they form a channel so large molecules can still move in or out of the cell.
So, salt, water, and fats do not contribute to the movement of larger molecules, but <u>channel or transport proteins do and choice A is correct. </u>
No but they are considered protected
Answer:
The answer is Homo Erectus.
Explanation:
There is evidence that the first hominid species that controlled fire and migrated was homo erectus which was about 400.000 years ago but it is not accurately known and can range between 200.000 and 1.7 million years.
I hope this answer helps.
<span>The answer to the question "A mutation in yeast makes it unable to convert pyruvate to ethanol. how will this mutation affect these yeast cells" is "a" the mutant yeast will be unable to grow anaerobically.</span>
nice I'm going to do this with all the answers i have now