Which blood type is the universal donor?
1.A+
2.B
3.AB+
4.AB
5.O
5
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Which of the following is NOT true concerning the
cytokines? In vertebrates they a. control many aspects of immunity. b. lyse pathogenic cells. c. serve in cell-to-cell communication. d. include the interleukins and interferons. e. include tumor necrosis factors.
The theory of independent assortment
a. cannot be demonstrated in a monohybrid cross. b. is illustrated by the behavior of linked genes. c. indicates that the expression of one gene is independent of the action of another gene. d. states that alleles for the same characteristic separate during meiosis. e. is negated by epistasis
Which of the following statements concerning the type of support illustrated in Figure 40-2 is false?
a. It is flexible. b. It can be found in cnidarians. c. It demonstrates cells working in an antagonistic fashion. d. It it absent in vertebrates that have an endoskeleton. e. It is dependent on fluids being noncompressible.
What type of endocrine signaling is used predominantly by invertebrates?
a. autocrine signaling b. paracrine signaling c. classical endocrine signaling d. neuroendocrine signaling e. no endocrine signaling