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.
Hope it helped!
For your first question i think why are roses the best flowers
For your second question it is defeinitley what causes people to be clolor-blind
Answer
100 percent
Explanation:
If you cross rr and RR you get four offspring with the trait Rr. Since there is one capital letter, they will all exhibit the dominant trait. Hope this helped!
97 percent of the Earth's water can be found in our oceans
