The Milky Way galaxy contains approximately 300 billion stars, of which the Sun is an average sized star
Indicate whether the statement is true or false
TRUE
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A wire that carries an electric current
A) is electrically charged. B) may be electrically charged.
Some colonial powers frequently forced or urged peasant farmers to dedicate part of their traditional paddy land to cultivating crops for export, a system called:
A) export processing B) cash cropping C) plantationism D) paddy slavery
A species with a broad niche is considered a(n) ____ species.
A. endemic B. endangered C. specialist D. native E. generalist
How do scientists use lake sediments to study past climates?
A) Lake sediments contain organic materials that can be identified to species and radiocarbon dated, thereby giving insight into past plant communities and related climatic conditions. B) Isotopic analysis of the relative proportions of 18O to 16O enable determination of evaporation rates from ancient lakes. C) During warmer conditions, lake sediments form wider rings, whereas in cooler conditions, these rings are narrower. D) The amount and type of pollen in lake sediments is an indication of the macrovertebrate assemblages that dominated an area. E) Lake sediment analysis is used to determine which fish species have persisted in a particular lake over long periods of time.