Oxygen<span>, </span>sulfur<span>, </span>nitrogen<span>, and </span>hydrogen<span>.
</span>
<u>L</u><u>ipids</u>
Explanation:
The principal components of the plasma membrane are lipids
- keystone species is the correct answer.
<u>keystone species</u> which keeps the number of other animal population in
control and low in the entire ecosystem. They play an important role
through this process and helps the food chain effectively.
dominant species - most common species; found often in the ecosystem.
invasive species - which fights for itself survival and can cause harm to
ecosystem. non-native to an ecosystem
The answer is stem cells. Normal stem cells and germ cells can also be said to be immortal
Toxins in the soil would enter through the root system first.
