When a Gram positive bacterial culture is too old, it is possible that the Gram stain reaction will not be accurate. This is because the cell wall of an old bacterial cell has become weakened. Therefore, the cell wall becomes “leaky” and is more likely to no longer be able to retain the primary dye during the Gram stain procedure.

When ash and dust begin to settle on the ground, they eventually become compacted by

To store strawberries in sugar syrup, lucy placed them in a jar and covered them with sugar but did not add any water. do you think syrup will be formed? justify. a. no. since water is not added, there cannot be any syrup formation. b. no. the higher concentration of sugar on the outside will cause the water from the sugar to diffuse in the strawberry cells causing them to swell without formation of any syrup. c. yes. the higher concentration of sugar on the outside will cause the water from the strawberry to diffuse out resulting in syrup formation. d. yes. the sugar will melt over time and form the syrup.

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?