In what part of the life cycle does DNA
replication occur?
a. G1
b. G2
c. S
d. prophase
e. more than one of these
C
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Smoking tobacco regularly during pregnancy
results in all EXCEPT a. increased risk of miscarriage. b. newborns of lower birth weight. c. reduced vitamin C levels for the mother-tobe and for her fetus. d. fetal facial and cranial deformities. e. higher incidence of fetal heart defects.
Using Figure 53-2, identify the point that indicates the carrying capacity for this population
a. A
b. B
c. C
d. D
e. Cannot be determined from this graph.
Which protist causes African sleeping sickness?
A) Didinium B) Plasmodium C) Giardia D) Trypanosoma E) Pfiesteria
The crawling displayed by many embryonic cells in animals involves distinct events. Which of the following sequences places these events in correct order?
A) protrusion at the cell's leading edge, attachment of protrusion, pulling the cell forward, release and retraction of trailing edge B) attachment of protrusion, pulling the cell forward, protrusion at the cell's leading edge, release and retraction of trailing edge C) release and retraction of protrusion, protrusion at the cell's leading edge, attachment of trailing edge, pulling the cell forward D) attachment of protrusion, protrusion at the cell's leading edge, pulling the cell forward, release and retraction of trailing edge E) pulling the cell forward, release and retraction of protrusion, protrusion at the cell's leading edge, attachment of trailing edge