Nuclear power plants produce radioactive wastes. Over time, scientists have made many different proposals for disposing of these wastes. Today, most radioactive waste is buried deep underground. What risk does this most likely pose?

A) disruption of geothermal energy sources

B) destruction of the soil's fertility

C) decrease of local air quality

D) contamination of groundwater

With the word calcite wich completes the analogy mineral, erosion, marble, or aragonite

How are proteins and nucleic acids related? they both provide energy. they both carry genetic information. the structure of proteins is determined by nucleic acids. the subunits of nucleic acids are also the subunits of proteins.

Fill in the blank 1. digestion occurs in the small intestine through the action of enzymes. 2. urea, excess water, and other waste materials are eliminated in a water fluid called 3. can cause infections by injecting dna or rna into hosts. 4. the human immune system produces in response to a vaccine, which later can bind to and destroy a pathogen if it invades. 5. are structures that link bone to bone at a joint 6. in the heart, blood flows from the right atrium to the right ventricle, where it is pumped to the the words i can use are: lymphocytes gliding pivot gas urine absorption dermis fulcrum lungs chemical viruses capillary vertebrae esophagus tendons antibodies synapses ligaments kidneys pathogens