heart wood sap wood

Question 1

as what plant ages?

Answer 1

woody plants

Question 2

older layers of what tissue?

Answer 2

secondary xylem

Question 3

no longer transports what?

Answer 3

water and minerals

Question 4

why these older 2dry regions are called heartwood?

Answer 4

because these layers are close to the center of stem and root

Question 5

close to center of what?

Answer 5

stem or root

Question 6

newest outer layers of what ?

Answer 6

2 xylem

Question 7

newest outer layers of 2ndry xylem transports still what?

Answer 7

xylem sap

Question 8

newest outer layers that transport xylem sap is called what?

Answer 8

sapwood

Question 9

what wood is generally darker

Answer 9

heart wood

Question 10

why the heart wood is darker than the sapwood?

Answer 10

because resins and other components permeate cell cavities.

Question 11

what are the things that permeate cell cavities of the heart wood?

Answer 11

resins and other compounds

Question 12

resins and other compounds permeate the cell cavities help in what else?

Answer 12

help to protect core of the tree from fungi and wood boring insects.

Question 13

heart wood helps to protect core of the tree from what?

Answer 13

from fungi and wood boring insects

Question 14

which phloem functions in phloem translocation?

Answer 14

young secondary phloem

Question 15

what happens to the older secondary phloem?

Answer 15

older secondary phloem is sloughed off