Answer:
Oxygen and carbon dioxide!
Explanation:
Oxygen and carbon dioxide are uncharged small molecules that can freely pass through a biological membrane. :)
II and III only. The fungus is a heterotroph, since it's not making it's own food, but it's also a Saprotroph (since it externally digests dead organic materials; saprotrophs are a special subset of heterotrophs).
They disguise themselves as white blood cells
Cyanobacteria play an important role in the biosphere by converting atmospheric nitrogen into mineral nitrogen directly assimilated by other organisms. This capacity is of fundamental importance in coral reefs where nutrients are scarce.
Moreover, Cyanobacteria are the micro-organisms of choice for humans in various branches of biotechnology because of the many families of molecules that they produce and which have an interest in valorization.
A sugar<span>-phosphate </span>backbone<span> (alternating grey-dark grey) joins together nucleotides in a </span>DNA<span> sequence. The </span>sugar-phosphatebackbone<span> forms the structural framework of nucleic acids, including</span>DNA<span> and RNA. This </span>backbone<span> is composed of alternating </span>sugar<span> and phosphate groups, and defines directionality of the </span>molecule<span>.
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