I dont do biology so im not sure but i think it means they are currently fighting off an infection so they have produced more white blood cells as part of their immune system kicking in... thank house if its right!
The part of the stem that gives rise to this pattern is : B. xylem
xylem is responsible in transporting water and nutrients. It die after a year or so and will leave the concentric pattern as it die
hope this helps
The race cares produce waste answer by
1. polluting the environment
2.by emitting waste that led to human health problems
The race cares generate waste which led to pollution of environment. The use of motor oil, brake fluid and leaded gasoline led to production of toxic chemicals These chemical have been shown to cause cancer, birth defect and kidney problems.
They are easy to be addicted to
they can hurt your mind
they are so addictive that you use them so frequently (hence the word abusing)