Which of the following is not true concerning cover crops?
a.
they prevent soil erosion
b.
they can fix nitrogen in soil
c.
they are sold as cash crops
d.
they add organic matter to soil

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

The term facultative anaerobe refers to an organism that

Malaria is caused by which type of microorganism? a. fungi b. bacteria c. protozoa d. worms