Where would you expect to find sapwood in a cross section of a tree trunk?
A. just before the periderm
B. in the bark
C. in the center
D. in the roots
E. just under the bark
E. just under the bark
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In the first step in oogenesis
A) a primary oocyte divides to form a secondary oocyte and a first polar body. B) an oogonium accumulates cytoplasm and DNA replicates. C) a stem cell divides to yield an oogonium and a spermatogonium. D) an oocyte divides to yield two polar bodies.
A solution with a pH of 9 has ____ times fewer hydrogen ions than a solution with a pH of 6
a. two b. four c. 10 d. 100 e. 1,000
During which stage or phase of the cell cycle does the cell replicate its chromosomes?
A) M phase B) G1 C) G2 D) S E) G0
Wernicke's and Broca's regions of the brain affect _____
A) olfaction B) vision C) speech D) hearing