What is meant by the "black market economy"? What will be an ideal response?
Plankton include many different photosynthetic and chemosynthetic species that are
responsible for contributing to ocean primary productivity. The word is derived from the
Greek word planktos, which means “wandering.” Plankton drift or swim weakly, going
where the ocean goes, unable to move consistently against waves or current flow. In contrast,
the word nekton (nektos, “swimming”) describes organisms that actively swim. The term
plankton or nekton is not a collective natural category like molluscs or algae, which implies
an ancestral (evolutionary) relationship among the organisms; instead, it describes a common
ecological connection, a lifestyle. Members of the plankton community, also referred to as
plankters, can and do interact with one another. Some can swim weakly. Grazing, predation,
parasitism, and competition occur among members of this dynamic group
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What is glasnost?
A) the Russian word for railroad B) a USSR policy of greater openness during the 1980s that encouraged several Soviet republics to demand independence C) a policy of education improvement, in the last days of the former Soviet Union D) improvement of the Russian environment E) planned economic restructuring, an early move toward a freer market
Almost half of the world's people speak languages belonging to the ____________ language family.
a. Indo European b. Sino-Tibetan c. Austronesian d. Trans-New Guinea e. Afro-Asiatic-Indo-European
What Zooplankton is considered a keystone species?
A) Ctenophores B) Meroplankton C) Pteropods D) Krill
In the United States, thunderstorms are most common in
A) central Florida. B) Kansas. C) Oklahoma. D) Louisiana.