The peripheral nervous system is composed of the ____.
A. brain and spinal cord
B. brain and somatic nerves
C. spinal cord and somatic nerves
D. spinal nerves and cranial nerves
E. spinal cord and spinal nerves
Answer: D
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Predict how phospholipids would arrange themselves if they were placed into a nonpolar solution
A. The phospholipid heads would orient toward the solution. B. The phospholipid tails would orient toward the solution. C. The phospholipids would form a bilayer. D. The phospholipid would form a liposome.
Answer the following statements true (T) or false (F)
1. In the evolution of plants, wood appeared before seeds. 2. Ginkgo trees and humans have similar chromosomal sex-determination systems. 3. The fig tree Ficus tremula produces unique inflorescences that are only accessible to a particular species of pollinating fig wasp Courtella wardi. The inflorescence provides a protected space for the fig wasp to lay eggs which then develop into the next generation of adult fig wasps. This relationship between the fig tree and the fig wasp is an example of coevolution. 4. In the fall, squirrels often harvest large numbers of acorns and bury some of them for future consumption. Over the winter, however, many of these acorns are forgotten by the squirrels and germinate in the spring, producing the next generation of oak trees. This relationship between the squirrel and oak tree is an example of a coevolved seed dispersal mechanism.
Which of the following intermediate filament proteins is incorrectly matched with the cell type in which it is found?
A) keratin - epithelial cells B) desmin - smooth muscle cells C) vimentin - mesenchymal cells D) nestin - connective tissue cells E) GFA protein - glial cells
Bone is composed only of nonliving material
Indicate whether the statement is true or false