The migratory neural crest cells _____
A) form most of the central nervous system
B) form the spinal cord in the frog
C) form a variety of neural and non-neural structures
D) form the lining of the lungs and of the digestive tract
C
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Why is it so necessary for cells to communicate with each other in a regulated way?
What will be an ideal response?
From which cellular component do cilia and flagella arise?
a. the chromosome b. the centriole c. the nucleus d. the Golgi complex
How would you argue that meiosis is the basis for sexual reproduction in plants, even though the direct result is a spore rather than a gamete?
What will be an ideal response?
_____ are close interactions between species that have evolved over long periods of time. When these interactions enhance the reproduction and population growth of both species, they are called _____
A. Symbioses; mutualisms B. Mutualisms; symbioses C. Symbioses; antagonisms D. Antagonisms; symbioses E. Antagonisms; mutualisms F. Mutualisms; antagonisms