Cuál de los siguientes enunciados sobre el ciclo del nitrógeno es cierto? A. Aunque el nitrógeno es el gas atmosférico más abundante, las plantas no lo pueden utilizar directamente del aire.
B. El adicionar fertilizantes sintéticos a los campos de cultivo remueve nitrógeno necesario del ciclo.
C. Los relámpagos toman moléculas extra de nitrogeno atmosférico y lo reciclan.
D. Las bacterias localizadas en el suelo atrapan exceso de oxígeno atmosférico y lo ayudan a entrar a las raíces de las plantas.

The movement of tectonic plates in two different locations is shown below: two blocks labeled location a and location b are shown. at location a the top layer of the block shows two horizontal arrows pointing towards each other. small dunes are shown in the middle between the two arrows. the block labeled b has a vertical line in the middle. on the left of the line there is an arrow pointing down. on the right of the vertical line there is an arrow pointing up which statement is most likely true? subduction may occur in both locations. earthquakes may occur in both locations. subduction may occur in location a only and a volcanic eruption may occur in location b only. an earthquake may occur in location a only and a volcanic eruption may occur in location b only.

Structures in cells that carry out specific functions.

What will happen to a population of predators if there is a sudden, temporary increase in the number of prey? a. the population of predators will be uniform with no change. b. the population of predators will increase first and then decrease slowly. c. the population of predators will increase continuously.