A new treatment for burns involves using skin biopsies to generate ____________________, which are sprayed onto the burned area and form a new layer of skin
Fill in the blank(s) with correct word
skin stem cells
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It is difficult to pinpoint when the first terrestrial plants appeared because early plants lacked spores
Indicate whether the statement is true or false.
Bile helps in the digestion of _____.
A. carbohydrates B. fats C. carbohydrates D. proteins E. nucleic acids
A substance similar to table salt, called magnesium chloride, separates into positively charged magnesium ions and negatively charged chloride ions when placed in water. If you were to look at the magnesium ions dissolved in the water, what would you see?
A) The magnesium ions would be surrounded by chloride ions. B) The magnesium ions would be surrounded by water molecules with their hydrogen atoms facing the magnesium ions. C) The magnesium ions would be surrounded by water molecules with their oxygen atoms facing the magnesium ions. D) The magnesium ions would be drifting by themselves, without any water molecules nearby. E) The magnesium ions would be covalently bonded to water molecules.
The amino acids in a polypeptide chain are connected by:
A) covalent bonds. B) glycosidic bonds. C) peptide bonds. D) both a and c.