Alarge amount of algae in a lake is a result of: a. global warming b. rain forest destruction c. phosphate and nitrogen pollution d. a decrease in the number of decomposers

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

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

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above