A. temperature and salinity
Answer: because the structure of their cell wall is unable to retain the crystal violet stain
Explanation:
Due to differences in the thickness of a peptidoglycan layer in the cell membrane between Gram-positive and Gram-negative bacteria, Gram-positive bacteria (with a thicker peptidoglycan layer) retain crystal violet stain during the decolorization process, while Gram-negative bacteria lose the crystal violet stain
<span>Ingrid asked, "How was the science fair?"
"It was weird," answered Lenny. "My volcano exploded and melted the table!"
"At least it worked," said Ingrid.</span>
