Which plankton are considered microplankton?
A) Silicoflagellates
B) Dinoflagellates
C) Coccolithophores
D) Cyanobacteria
B
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Which of the following intermolecular forces best describes why molecules like CF3CF3 are soluble in liquid CO2?
A. hydrogen bonding B. induced dipole-induced dipole C. dipole-dipole D. ion-dipole E. dipole-induced dipole
Wind erosion occurs by ____
A)saltation only B)abrasion only C)deflation only D)saltation and abrasion E)abrasion and deflation
In a closed basin, a single-node standing wave oscillation tends to have a wavelength that is ________ the basin length.
A. the same as B. twice C. four times D. one-quarter E. one-half
The half-life of carbon-14 is about 6000 years. Assume that a sample of charcoal formed by burning of living wood 15,000 years ago. How much of the original carbon-14 would remain today?
A) between one-fourth and one-eighth B) between one-half and one-fourth C) more than one-half D) between one-half and one-third