(A) nerve cords, because adults lack a notochord (a dorsal hollow nerve cord).
Answer: Layers of the Epidermis. The epidermis is the outermost layer of our skin. It is the layer we see with our eyes. It contains no blood supply of its own—which is why you can shave your skin and not cause any bleeding despite losing many cells in the process.
<span>descriptions of the number, size, and arrangement of parts of the organism.</span>
Catalase is an enzyme, a large protein that speeds up the rate of a chemical reaction. The optimum pH level of catalase is between pH 7 and pH 11. At a pH level lower or higher than this range, the catalase stops working.
From the given options, the following sidovery involving DNA happened first: C) Griffith learned that a chemical changed harmless cells into harmful cells.
The British medical officer named Frederick Griffith discovered DNA in 1928 while conducting experiments using Streptococcus pneumoniae bacteria and mice.
<span>He concluded that the living R bacteria had been transformed into pathogenic S bacteria by an unknown, heritable substance from the dead S cells that allowed the R cells to make capsules.</span>
