Most of the water absorbed by the plant enters through the
A. root cap.
B. lenticels.
C. root apical meristem.
D. stomata.
E. root hairs.
Answer: E
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Which of the following functional groups would you expect to find in aerobic iron- and sulfur-rich acidic mine drainage?
A) dissimilative iron-oxidizers B) dissimilative iron-reducers C) purple sulfur bacteria D) purple sulfur bacteria and dissimilative iron-reducers
Muscles that can be controlled and precisely and delicately have few muscle fibers in each motor unit
Indicate whether the statement is true or false.
If black fur color is controlled by a dominant allele (B) and brown by its recessive allele (b), give the genotypes of the parents if a black male crossed with a brown female and produces 1/2 black offspring and 1/2 brown offspring.
A. BB male and bb female B. Bb male abd bb female C. Bb male and Bb female D. BB male and BB female E. bb male and Bb female
Which of the following occurs during metaphase?
A. Chromosomes are about 30 nm wide. B. Heterochromatin is converted to euchromatin. C. The "beads on a string" structure is visible. D. Chromosomes undergo gene transcription. E. Chromosomes are much shorter than they were in interphase.