Evaporation of water creates a negative vaccum in the leaves causing water to be drawn up the xylem
hope that helps
Yes si si si si
Yes si si si si
Answer:
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Explanation:
1. As given, cell cycle is of 8.30 hours.
G1 phase= 4 hours;
S phase= 2 hours;
G2 phase = 2 hours;
M phase= 30 minutes.
2. Adding up each phase shows that the cell cycle is 8.5 hours long. As after 9 hours, the radio labeled cells would have passed through a full cycle ( from G-1 to m phase) and be in either S phase or G2- phase and none cell would have entered M Phase.
3. DNA synthesis occurs only in S-phase, so the incorporation of any radioactive nucleotide happens in S-phase only.
4. M phase, cell divide itself into two daughter cells.
