Spores and seeds have basically the same function-dispersal-but are vastly different because spores (D) are unicellular; seeds are not.
<h3>What are unicellular organism?</h3>
A unicellular organism can be regarded as single-celled organism, which are those organisms that consists of a single cell.
This is different from multicellular organism because it consists of multiple cells however Organisms can be selected base on general categories which are prokaryotic organisms and eukaryotic organisms.
It should be noted that Spores and seeds have basically the same function-dispersal-but are vastly different because spores (D) are unicellular; seeds are not.
Therefore option D is correct.
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The plasma membrane of the enveloped alga cell serves as the source of the apicoplast's second outermost membrane.
<h3>Where did all chloroplasts come from?</h3>
Chloroplasts were first established in eukaryotes through an endosymbiotic relationship with a cyanobacterium; they later spread through the evolution of eukaryotic hosts and the subsequent engulfment of eukaryotic algae by formerly nonphotosynthetic eukaryotes.
<h3>How did eukaryotic cells develop mitochondria and chloroplasts?</h3>
Chloroplasts and mitochondria most likely developed from engulfed bacteria that once existed as autonomous organisms. An aerobic bacterium was eventually swallowed by a eukaryotic cell, which later established an endosymbiotic bond with the host eukaryote and gradually transformed into a mitochondrion.
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The same ligand can bind to different receptors causing different responses (e.g.. acetylcholine). On the other hand, different ligands binding to different receptors can produce the same cellular response (e.g. glucagon, epinephrine).
<span>Protein is made up of building blocks called amino acids</span>