Which of these is most likely to contribute to the long-term instability of a local ecosystem? a) storms that uproot large trees in the area b) introduction of a non-native animal species c) seasonal migration of birds to and from the ecosystem d) flash floods that destroy the nests of local water birds

Which of the following is not a benefit of green revolution? a) new crop varieties b) increased crop yields c) cost effective d) new crops may require larger amonts of water than the previous ones.

Name one similarity and one difference between the morphology of a brachiopod and a bivalve

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils