Figure 26.17 -Based on Figure 26.17,you Conclude

question 42

Multiple Choice

figure 26.17
-Based on figure 26.17,you conclude:

• A)c-opsin arose independently in vertebrates
• B)r-opsin arose independently in invertebrates
• C)an organism can only have one type of opsin
• D)c-opsin and r-opsin arose from a common ancestral protein
• E)c-opsins are in photoreceptor cells in vertebrates and invertebrates

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Definitions:

Abnormal Dilations

unusual expansions or widenings of vessels, cavities, or organ passages in the body.

Metabolism

The set of life-sustaining chemical reactions in organisms that involve the conversion of food to energy, the construction of proteins and nucleic acids, and the breakdown of waste products.

Fats

Nutrients that give energy, support cell growth, and help in the absorption of certain vitamins.

Niacin

A water-soluble B vitamin (B3) that is essential for energy metabolism and the health of the nervous system, skin, and digestive system.