Which of the following are not biotic factors in a terrestrial ecosystem?
a. herbivore population
b. plants
c. rivers
d. soil bacteria

Which of the following is not a defining characteristic of plants?

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

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