Answer:
Explanation:
The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. ... After ice melts into liquid water, you can refreeze it into solid ice if the temperature drops. Freezing and melting are physical changes.
What do bacteria have surrounding their cell membrane?
cell wall
Because in that way we keep thinking about them. How can you forget something when you're thinking about it?!
Answer: They contain DNA and RNA, they can exhibit a wide range of lifestyles, and they are essential to almost every ecosystem.
Explanation:
The bias conditions that must be present for the normal operation of a
transistor amplifier will be those in which the emitter-base junction is
forward biased, and the collector-base junction will be reverse biased.
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