Waxy coatings, such as found on skin, hair, and feathers of some animals and the cuticle of some
plants, are commonly used by living organisms for protection against water loss and for lubrication.
Such waxes are considered to be a type of ____.
a. triglyceride
b. steroid
c. neutral lipid
d. phospholipid
e. fatty acid
C
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A substance that can elicit an immune response from a lymphocyte is called a(n) ________
A) defensive protein B) pathogen C) antibody D) antigen
Which of the following is not a part of the bark?
a. phloem b. periderm c. cork d. xylem e. resin ducts
Which of the following statements about the human genome is INCORRECT?
A) There are approximately 3.1 billion bp in the human genome. B) Human share a majority of genes with other species. C) Less than 2 percent of the genome codes for proteins. D) The human genome contains approximately 100,000 genes. E) The functions of most human genes are still unknown.
The major divisions of the peripheral nervous system are the ____.
A. somatic and autonomic systems B. sympathetic and parasympathetic systems C. peripheral and central systems D. afferent and autonomic systems E. cranial and skeletal nerves