Which of the following statements about eutrophication is true? a. Eutrophication occurs when excess nutrients are present in aquatic ecosystems, resulting in the
increased production of plant life and the subsequent increase in the oxygen levels of the water.
b. Eutrophication occurs when excess nutrients are present in aquatic ecosystems, resulting in the
increased production of plant life and the subsequent decrease in the oxygen levels of the water.
C. Eutrophication involves the overpopulation of aquatic ecosystems with plant and animal life.
d. Eutrophication is rarely caused by human activity.
.

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg 

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus