Parenchyma, collenchyma, and sclerenchyma are all types of cells derived from
A. procambium tissue.
B. ground tissue.
C. vascular cambium tissue.
D. cork cambium tissue.
E. epidermal tissue.
B. ground tissue.
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The central nervous system of a mammal includes the
(a) brain. (b) spinal cord. (c) brain and spinal cord. (d) brain, spinal cord, and every major nerve in the body.
What is the function of the iris?
a. control the amount of light entering the eye b. focus the image on the retina c. respond to particular colors d. keep the lens under tension to allow for image focusing e. prevent light scattering upon entry to the eye
In a signal transduction pathway involving cAMP as a second messenger, after a G protein is activated, the activated
G protein then activates:a. phospholipase C. b. adenylyl cyclase. c. calmodulin. d. protein kinase. e. diacylglycerol.
Assuming that a particular disorder is caused by an allele of a single gene, what feature of a pedigree would allow one to conclude that the disorder was caused by a dominant allele?
a) two unaffected parents have an unaffected child b) two unaffected parents have an affected child c) an affected mother only has affected sons d) two affected parents have an unaffected child e) all of the descendants of a particular affected person are also affected