Insulin-like growth factor I is produced in response to
A. growth hormone.
B. cortisol.
C. prolactin.
D. adrenocorticotropic-releasing hormone.
E. thyroid hormone.
A. growth hormone.
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Some breeds of dogs that are specialized to retrieve objects from bodies of water have webbing between their toes. A change in what cellular response to positional information during digit formation could account for this morphological feature?
A. Signals that cause differentiation to toes are not received by cells that become webbing. B. Signals to cause apoptosis are not received by cells that become webbing. C. Cells between the future digits migrate, but do not divide once they are in the region that will become toes. D. Cells between the future digits divide, but do not migrate to the region that will become toes. E. Cells between the future digits do not divide before migrating to the region that will become toes.
What event will most likely create an emerging disease? a. The host species goes extinct
b. The composition of the community changes. c. The virus reproduces very quickly. d. The mutation alters the viral genome. e. A hundred years passing since its first appearance.
Cells that contain a nucleus are eukaryotic, and cells without a nucleus are ________
Fill in the blank(s) with correct word
The ____ grows into the spinal cord while the ____ grows from it.
A. Dorsal Root; Ventral Root B. Dorsal Root; Dorsal Ramus C. Ventral Root; Dorsal Ramus D. Ventral Root; Dorsal Root E. Ventral Root; Ventral Ramus