What happens to the nitrogen excreted by animals?

a
nitrogen is converted into ammonia.
b
nitrogen is released back into the environment.
c
nitrates are converted into proteins.
d
nitrates are reabsorbed by the animal.

In 2015, about ten percent of total u.s. energy consumption was from renewable energy sources. renewable energy plays an important role in reducing greenhouse gas emissions. when renewable energy sources are used, the demand for fossil fuels is reduced. sanjay and his family want to cut back on their use of non-renewable resources at home. they are thinking of an alternate way to heat their home without adding more greenhouse gases or pollutants to the environment. which renewable resource would not fit into their plan? a) solar power b) burning wood c) constructing a wind turbine eliminate d) generating hydroelectric power

Which component in a graph indicates an independent factor? a. y-axis b. x-axis c. scale

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million