Figure 32.1 -As You Are on the Way to Tahiti for a for a Vacation,your

question 31

Multiple Choice

Figure 32.1
-As you are on the way to Tahiti for a vacation,your plane crash-lands on a previously undiscovered island.You soon find that the island is teeming with unfamiliar organisms and,as a student of biology,you decide to survey them (with the aid of the Insta-Lab Portable Laboratory you brought along in your suitcase) .You select three organisms and observe them in detail,making the notations found in Figure 32.1. Which organism would you classify as an animal?

• A)organism A
• B)organism B
• C)organism C

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Definitions:

Phytochrome

A photoreceptor in plants that absorbs light primarily in the red and far-red regions, thereby regulating various aspects of growth and development.

Cryptochrome

A class of flavoproteins that are sensitive to blue light and have roles in the circadian rhythms of plants and animals.

Circadian Rhythm

A natural, internal process that regulates the sleep-wake cycle and repeats on each rotation of the Earth roughly every 24 hours.

Thigmomorphogenesis

The growth and developmental changes in plants that result from mechanical stimulation or touch.