The xylem is made from dead, hollow cells.
<span>
Tracheids and vessel elements are the main components of xylem witch have a function to transport water. Those are elongated dead cells at maturity (without protoplast) with a thick, strengthened cellulose cell wall and a hollow lumen. Even though they are dead they still maintain a function, because are being protected by surrounding living cells.</span>
Answer:
B. Geothermal
Explanation:
Fossil fuels and coal both require extremely old material to form. Geothermal energy is generated and stored in Earth.
I believe it goes in the following order top down
1 5 3 4 2.
Molecular homology, because it compares dna