Streak plates are most useful in
A) isolating individual cells.
B) allowing colony morphology to be observed.
C) separating different organisms.
D) all of the above.
Ans: D) all of the above.
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The chorionic villi eventually form the placenta, a disc-shaped structure that ____
a. releases sex hormones at appropriate times throughout pregnancy b. initiates uterine contractions c. binds to the zygote to accelerate organ development d. nourishes the embryo throughout pregnancy e. prevents infection by blocking the passage of microorganisms through the cervix during pregnancy
Bacteriophage lambda ____
a. is a temperate phage b. is a virulent phage c. infects plant cells d. infects animal cells e. is a T-even phage
Define the term "evaporite"
What will be an ideal response?
When retreating glaciers carved deep coastal valleys they created:
a. fjords. b. salt-wedge estuaries. c. well-mixed estuaries. d. tectonic estuaries. e. drowned river valleys.