Viruses, bacteria, fungus,Protozoa and worms
The answer to this is C because humans don't have cell walls and if you are looking at an onion it has a cell wall because it is a plant.
They are well at surviving because of their thick white coat. The white fur helps them blend in with the snow and ice. The polar bear also has a layer of fat under their skin so they can survive harsh temperatures.
<span>. Estuaries have been called the "nurseries of the sea" because the protected environment and abundant food provide an ideal location for fish and shellfish to reproduce. Most commercially important fish species spend some part of their life cycle in estuaries. Besides fish, many species of birds depend on estuaries for food and nesting areas. Migratory birds use estuaries as stopover points for resting and feeding before continuing their journey. Marine mammals also use estuaries as feeding grounds and nurseries.</span>
Answer:
im pretty sure its A. ATP was a thing talked about a lot on this topic
Explanation:
