Briefly describe how toxic materials like DDT that have low concentrations in the water column affect organisms at distant locations
What will be an ideal response?
Currents can move the toxins from their source and they are persistent. Two biological processes increase the toxicity of the compounds. Bioaccumulation occurs when a low-trophic-level organism actively takes up the toxin. Biological magnification occurs when predators concentrate the toxin further, eventually leading to lethal and sub-lethal effects.
You might also like to view...
Many Bacteria isolated from nature are natural lysogens
Indicate whether the statement is true or false.
Which of the treatments listed below would be MOST effective for a patient with a genetic defect that causes severe combined immunodeficiency (SCID)?
A) intravenous antibiotics B) bone marrow transplant C) multiple immunizations D) repeated doses of antisera
A normally functioning pancreas produces insulin, a hormone that causes cells to ____
a. produce glucagon b. take up and store glucose c. synthesize protein d. break down glucose e. produce glucagon
An insufficient number of particular types of cones causes
A) impaired night vision. B) macular degeneration. C) detachment of the retina. D) impaired color vision. E) glaucoma.