Answer:
The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies.
Explanation:
Specific immune responses are triggered by antigens. Antigens are usually found on the surface of pathogens and are unique to that particular pathogen. The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies.
The immune system review (article) | Khan Academy
When an ecosystem has a scarce nutrient, that is when there is a nutrient limitation.
So the answer is C. <span>Nitrogen is typically the limiting nutrient in freshwater environments.
This is because Nitrogen is the "scarce" nutrient </span>
Answer:
prokaryotic: Small cells in the domains Bacteria and Archaea that do not contain a membrane-bound nucleus or other membrane-bound organelles
<span>Prokaryotic organisms lack membrane bound nuclei as well as organelles.
</span>
Examples
-bacteria
-algae
The full form of ATP is ANANTAPUR Indian Railway Station ATP
Ambient Temperature Pressure Chemistry ATP
All Trace Particles Chemistry ATP
Adenosine Tri-phosphate. But there are alot more :)
