Recent studies on the evolutionary divergence of seed plants from seedless vascular plants used the genome of a ____,
a lycophyte, as a comparison for genomes of the more derived land plants.
a. numerous, large apical cells on the edges of their fronds
b. single, large apical cell on the tip of their fronds
c. single, large apical cell at the tip of their apical meristems
d. numerous, small apical cells at the base of their apical meristems
e. single, small apical cell at the base of their apical meristems
ANSWER: c
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Imagine that you are monitoring a test subject's blood. The pH of the blood is steadily decreasing, while the carbon dioxide levels are steadily increasing. What do you predict will occur?
A. As soon as oxygen levels decrease, the brain will stimulate an increase in the breathing rate. B. Because of the increase in carbon dioxide levels, the brain will stimulate an increase in the breathing rate. C. Because of the increase in carbon dioxide levels, the brain will decrease in the breathing rate.
The birth canal is the
a. oviduct. b. uterus. c. cervix. d. vagina. e. vulva.
In pea plants, round peas are dominant (R) and shriveled peas are recessive (r), and yellow peas (shown as light gray in the Punnett square) are dominant (Y) and green peas (dark gray) are recessive (y). Using this information and the partial Punnett
square shown, what were the phenotypes of the parental plants that were used in this cross by Mendel? A) Rryy and RrYy B) Rryy and rrYy C) RRyy and rryy D) RrYy and RrYy
In the vascular bundles of most eudicot stems, primary phloem differentiates toward the ________of the stem, while primary xylem differentiates toward the ________of the stem.
A. middle; middle B. cork cambium; vascular cambium C. middle; outside D. shoot tip; roots E. outside; middle