Which of the following best describes how DDT use lead to a serious decline in the osprey population of Long Island Sound during the late 1950's and 1960's?
A) DDT was sprayed on the grasses and contaminated the osprey chicks that walked through the grass.
B) The osprey chicks ate insects that were contaminated with DDT which lead to chick mortality.
C) The adult ospreys ate DDT contaminated fish and died from eating the poisonous fish.
D) Adult ospreys could not produce normal thickness eggs due to DDT in their food supply.
E) DDT was sprayed on the nesting sites in an attempt to eradicate mosquitos along the shoreline.
D
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Indicate whether the statement is true or false
From this cross section of the Grand Canyon, what are the oldest rocks or structures?
A. Mesozoic sedimentary rocks B. Hurricane Fault and faults along the Grand Wash Cliffs C. Late Cenozoic basalts D. Precambrian metamorphic rocks and granite E. Precambrian sedimentary and igneous rocks
The sensory cells for hearing are found in the
A) middle ear. B) eardrum. C) pinna. D) cochlea.
A mantle plume rises because
A. it is propelled upward by gas coming out of the magma. B. it is mostly molten. C. it is solid but less dense than material around it. D. it is molten and more dense than material around it.