Changes in cell position occur extensively during _____
A) organogenesis, but not during gastrulation or cleavage
B) cleavage, but not during gastrulation or organogenesis
C) gastrulation and cleavage
D) gastrulation
D
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Circular DNA molecules found in nature (such as bacterial, viral, or mitochondrial DNA) are
A) positively supercoiled. B) negatively supercoiled. C) not supercoiled, due to their small size. D) always oriented in a triple helix to conserve space. E) always in the relaxed state.
The figure below illustrates a __________ reaction
that produces a __________. a. condensation; hydroxyls; polymer b. condensation; water molecule c. cleavage; water molecules; monomer d. rearrangement; water molecules; polymer e. rearrangement; hydrogen ions; polymer
Which of the following occurs between meiosis I and meiosis II?
A. DNA replication B. Crossing over C. Random assortment D. Reduction of chromosome number E. None of these occur between meiosis I and meiosis II
Members of the genus ________ are associated with scarlet fever, rheumatic fever, pneumonia, etc.
Fill in the blank(s) with the appropriate word(s).