Use the Information Below to Answer the Following Questions

question 51

Multiple Choice

Use the information below to answer the following questions.
Flycatcher birds that migrate from Africa to Europe feed their nestlings mostly with moth caterpillars. The data presented show the mean dates of egg laying, hatching, and fledging of flycatcher young, and the 1980 and 2000 peak mass of caterpillars.

Figure 55.4
-The most likely cause for the shift in caterpillar peak mass is

• A)pesticide use.
• B)earlier migration returns of flycatchers.
• C)an innate change of biological clock by caterpillars.
• D)global warming.
• E)a decrease in the amount of calcium in the ecosystem.

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Definitions:

Neuron

A cell of the nervous system responsible for transmitting information through electrical and chemical signals.

Dendrites

Branched extensions of a neuron that receive signals from other neurons.

Axon

A long, slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neuron's cell body to other neurons, muscles, or glands.

Local Potential

Small changes in membrane potential that are localized and can lead to the generation of an action potential if threshold is reached.