The corpus callosum, which lies between the two cerebral hemispheres of the brain, is actually composed of an extensive network of
A. connective tissue.
B. cell bodies.
C. nerve tracts.
D. blood vessels.
Answer: C. nerve tracts.
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The head of a sperm cell contains a specialized organelle called the ____ , which contains enzymes used to transverse the outer coating of the egg
Fill in the blank with the appropriate word.
When bacteriophages use site-specific recombinases to enter the host genome and become dormant, they are said to be:
A. lytic phages. B. lysotoxic phages. C. parasitic phages. D. prophages. E. transducing phages.
For the purposes of this question, assume that a G1 somatic cell nucleus in a female Myrmecia pilosula contains 2 picograms of DNA. How much DNA would be expected in a metaphase I cell of a female?
A) 4 picograms B) 16 picograms C) 8 picograms D) 32 picograms E) Not enough information is provided to answer the question.
Which of the following statements is correct regarding archaea cells?
A) Archaea cells are found only in extreme environments. B) Archaea cells are found everywhere on Earth, just like bacteria cells. C) Bacteria and archaea cells are both in the same domain in the classification of life. D) Archaea cells contain organelles just like eukaryotic cells do.