The neural tube of vertebrates develops during morphogenesis of the nervous system by the
A. migration of mesoderm cells.
B. fusion of ectoderm and mesoderm.
C. extension of endoderm into a thin spinal column.
D. contraction of the endoderm away from the mesoderm.
E. folding of ectoderm tissue.
Answer: E
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Most of the following forms of communication are likely to be intercepted by an attentive third party
Select the exception.
a. visual b. auditory c. chemical d. electrical e. tactile
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What will be an ideal response?
Members of the genus Mycoplasma are pleomorphic and stain Gram-negative because they
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