Fishermen have harvested certain fish to the point where the population of that fish is decreasing. this level of direct harvesting could cause (1) ecosystems to be improved for future generations (2) ecosystems to be severely damaged (3) the restoration of environmental stability (4) all other fish species to increase in number

If a robot fixed another robot is it a engineer or doctor?

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

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