Why can agricultural run-off kill fish in coastal areas that are potentially hundreds of miles from the fields? a. the fertilizer traps sediments which ultimately clog the gills of the fish. b. the pesticides applied to the crops are selectively toxic to marine fish. c. excess fertilizer can cause dinoflagellate blooms which produce toxins. d. the freshwater from the rivers dilutes the salt water and kills the fish.

Biomass can be used to generate electricity. biomass relies heavily on agricultural crops. plants release carbon dioxide and water in combustion. plants use photosynthesis to originally generate the energy that is needed. the chemical energy of these plants all started with what energy source?

Select the word from the list that best fits the definition the temperature to which air must cool to be saturated

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody