Which list represents the correct order of structures from outside to inside in the stem of a vascular plant?
a. stele, cortex, epidermis, pith
b. epidermis, pith, cortex, stele
c. cortex, stele, pith, epidermis
d. epidermis, cortex, stele, pith
e. stele, epidermis, pith, cortex
ANSWER: d
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The female genetic ancestor of all living humans:
A. lived in Africa only 10,000 years ago. B. was the only living female of her tribe. C. was identified using haplotypes on the X chromosome. D. was the only female of her tribe to have children. E. was the only female whose mitochondrial DNA has been inherited in the modern human lineage.
The addition of a phosphate group to a molecule is termed ____
Fill in the blank(s) with the appropriate word(s).
If a cell has a greater concentration of solute than its environment
A. the cell is hypertonic to the environment. B. the cell is isotonic to the environment. C. the cell is hypotonic to the environment. D. the cell will not experience a net gain or loss of water. E. the cell will crenate.
It is now possible for parents to bank the umbilical cord blood of their children; the cells in the cord would then be available for use later in the life of the child to treat a genetic disorder or cancer, should it develop
Indicate whether the statement is true or false