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.

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

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#Question id: 1119

#SCPH28 | Zoology

Phosphorylation cascades involving a series of protein kinases are useful for cellular signal transduction because they:

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#Question id: 1120

#SCPH01 Biochemistry

A mutation that knocks out the GTPase activity of a G protein would have what effect on a cell?

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#Question id: 1120

#SCPH06 I Botany

A mutation that knocks out the GTPase activity of a G protein would have what effect on a cell?

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#Question id: 1120

#SCPH28 | Zoology

A mutation that knocks out the GTPase activity of a G protein would have what effect on a cell?

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#Question id: 1121

#SCPH01 Biochemistry

Which of the following provides the best evidence that cell-signaling pathways evolved early in the history of life?

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#Question id: 1121

#SCPH28 | Zoology

Which of the following provides the best evidence that cell-signaling pathways evolved early in the history of life?