Name a organism that does most of the Earth's nitrogen fixation for the nitrogen cycle

What adaptations would a plant in a river need that a plant in a pond would not need

Seahorses change color and swim together in predetermined ways before mating. these behaviors are called

Ways tadpoles are different from frogs

We humans are on track to more than double the atmospheric CO2 concentration that existed for the few millennia before the industrial revolution.

Which group of muscles elevates the first two ribs and flexes and rotates the neck? which group of muscles elevates the first two ribs and flexes and rotates the neck? the scalenes the spinalis the iliocostalis the splenius?

Where does the overwhelming amount of seismic activity occur on the earth?

Treatment for a patient with congestive heart failure and shortness of breath may include

Sea corals live exclusively in the ocean and are radially symmetrical. They have microscopic stinging barbs that shoot out to immobilize their prey. This allows corals to hunt even while they are stuck to the ocean floor.

Global warming is slowly melting the polar ice caps and glaciers, which are made up of freshwater. Marine organisms in which of the following zones of the ocean are going to be most affected by this process?

The two major pathways by which molecular nitrogen is converted into forms more useful to living organisms are