C.) Here, only "Flatworm" has bilateral symmetry
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The right answer is B. folding
The translation of the genetic information is done in two stages: one translates the sequence of the bases of the gene into amino acid sequence of the protein is the primary structure; the second translates this sequence into a complex, precisely defined three-dimensional structure, the only one able to confer on the protein its biological activity.
The second stage, or "protein folding", is at present one of the central problems of biological research.
Answer: Because each one of them helps other organs, cells, etc.. Because everything in your body needs to work together. For example, one of the most important functions of organ systems is to provide cells with oxygen and nutrients and to remove toxic waste products such as carbon dioxide.
The answer is D. Precambrian.
The small green areas are Chloroplast. There are what plants use to transfer sun light energy into sugars that are useful for the plants substantial growth. Hope this helped! (: