GENERAL HISTOLOGY

CONNECTIVE TISSUE GLAND

ENDOCRINE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following best explains why DDT has been found in penguin eggs in the Antarctic?
A
Chemicals used in one region of Earth can circulate in the biosphere and affect organisms in a distant region.
B
The large number of penguins in Antarctica has resulted in a depletion of their preferred foods.
C
Chemicals like DDT are volatile and eventually make their way to the ozone layer.
D
Because penguins incubate their eggs on land, the eggs are exposed to DDT
Explanation: 

Detailed explanation-1: -E) Because penguins incubate their eggs on land, the eggs are exposed to DDT. Chemicals used in one region of Earth can circulate in the biosphere and affect organisms in a distant region.

Detailed explanation-2: -WASHINGTON (Reuters)-The pesticide DDT, banned decades ago in much of the world, still shows up in penguins in Antarctica, probably due to the chemical’s accumulation in melting glaciers, a sea bird expert said on Friday.

Detailed explanation-3: -Which of the following best describes why DDT is classified as a persistent organic pollutant? DDT is very stable, and as much as 50% of the original concentration can remain in the soil 15 years after the initial application.

Detailed explanation-4: -Which of the following best describes why persistent organic pollutants (POPs) are toxic to organisms? They emit gamma radiation, increasing the likelihood of mutations and cancer. They do not break down easily and can accumulate in the fat tissue of an organism.

Detailed explanation-5: -Which of the following claims would be the best solution to the pest problem, based on the data in the graph? Use of Integrated Pest Management techniques is the most successful method because the sources for food, water, and shelter for pests are disrupted, leading to a reduced number of pests in the area.

There is 1 question to complete.