Is xylem a cell or a tissue or something

Urgent. the table shows the relative blood flow through some organs in the human body that is, the percentage of blood that flows through a given organ, through which organ(s) does all the blood flow? explain the effect of exercise on blood flow to skeletal muscles.

During binary fission, what events must occur before the cell splits into two new cells?

Spirochetes have a twisting and flexing locomotion due to appendages called