Answer:
The answer is D.) Mercury
1. The cell wall has lignin (hard substance): to prevent the xylem vessel from collapsing and withstand high pressure.
2. The absence of protoplasm (nucleus + cytoplasm) and cross wall: to allow water to move through the lumen easily.
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It requires energy when a substance must travel against a concentration gradient through the membrane
the branch of science concerned with the chemical and physicochemical processes and substances that occur within living organisms.
Answer:
Bacteria release carbon dioxide into the atmosphere when they break down dead plants.
