The polio vaccine currently administered in the U.S., known as IPV, is an example of a(n) ________ vaccine.
A. attenuated
B. inactivated
C. subunit
D. toxoid
E. recombinant
Answer: B
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Compare a pseudocoelom to a coelom.
A. A coelom is completely enclosed by mesoderm whereas a pseudocoelom has an outer covering of mesoderm and an inner one of endoderm. B. A pseudocoelom is completely enclosed by mesoderm whereas a coelom has an outer covering of mesoderm and an inner one of endoderm. C. The coelom is enclosed by ectoderm and the pseudocoelom is enclosed by endoderm. D. The pseudocoelom is enclosed by ectoderm and the coelom is enclosed by endoderm. E. The coelom is enclosed by ectoderm and the pseudocoelom is enclosed by mesoderm.
________ is used to measure the state of development of a biological community
a. Gross primary production b. Climax c. Community respiration d. Gross primary production to community respiration ratio
Examine Figure 18.5. Which of the following species would you characterize as restricted to serpentine soils in southwestern Oregon?
A) black oak B) hawkweed C) ragwort D) fireweed
Which of the following statements about the primosome is false?
A) The primosome is responsible for starting DNA replication. B) The primosome includes helicase to unwind the DNA. C) The primosome includes RNA polymerase to build the protein. D) The primosome is recruited to the origin of replication. E) The primosome includes primase to lay down RNA primers that will jump-start replication.