This lineage of Echinoderms are sea stars, each with a central disk surrounded by 5 to 20 "arms."

a. Echinoidea
b. Ophiuroidea
c. Crinoidea
d. Holothuroidea
e. Asteroidea


E

Biology & Microbiology

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Which of the following is NOT a hallmark of cancer?

A. Cell division in the absence of growth signals. B. Resistance to signals that slow cell division or promote death. C. Metastasis, which allows invasion of local tissues. D. Ability to stimulate growth of blood vessels to provide nutrients to the rapidly growing tumor. E. All of these choices are hallmarks of cancer.

Biology & Microbiology

Which specimen culture, if positive, should be immediately reported to the clinician?

a. Urine b. Blood c. Throat d. Stool

Biology & Microbiology

What is a characteristic of savannas?

a. Frequent fires b. Vertical layering of vegetation c. Long, cold winters d. Dense, deciduous trees

Biology & Microbiology

Which of the following is used to locate a gene

of interest in an established DNA library?

a. a probe b. a vector c. a clone d. a SNP e. a fragment

Biology & Microbiology