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
E
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Under anaerobic conditions, pyruvate can be broken down by ____
Fill in the blank with the appropriate word.
In males, testosterone (select all correct choices):
A. directs the development of male reproductive structures during embryogenesis. B. directs development of male secondary sexual characters during puberty. C. helps maintain adult health. D. acts on Sertoli cells. E. acts on Leydig cells.
Plasmids are self-replicating single stranded fragments of eukaryotic DNA. Indicate whether the statement is true or false
The job of this organ is to cleanse the blood of pathogens and worn-out or damaged RBCs.
A. tonsils B. nodes C. liver D. alveolus