EBK BIOLOGY: CONCEPTS AND APPLICATIONS
EBK BIOLOGY: CONCEPTS AND APPLICATIONS
9th Edition
ISBN: 8220100477805
Author: STARR
Publisher: CENGAGE L
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Chapter 20, Problem 3CT
Summary Introduction

To describe:

The functions served by the carotenoids other than photosynthesis in the bright, arctic environment.

Introduction:

Carotenoids is the class of fat-soluble pigments that give color to different parts of plants. They exist mainly in yellow, red, and orange color. Carotenoids are very important in photosynthesis as they absorb the light energy for the process of photosynthesis.

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“Watermelon snow” in Antarctica is caused by a certain species of photosynthetic green algae that thrives in subzero temperatures (Chlamydomonas nivalis). These algae are also found in high-altitude, year-round snowfields. In both locations, Uv light levels tend to be high. Propose an explanation for why this alga appears reddish-pink. The question is also in the picture
"Watermelon snow" in Antarctica is caused by a species of photosynthetic green algae that thrives in subzero temperatures (Chlamydomonas nivalis). These algae are also found in high altitude in year-round snowfields. In both locations, UV light levels tend to be high. The reddish-pink color of these algae is due to the presence of carotenoid pigments, which absorb blue light while reflecting red light. Those pigments protect the chloroplast from ultraviolet radiation, as well as absorbing heat, which provides the algae with liquid water as the snow melts around it. This molecular variation in plants illustrates  a relative fitness because the molecular adaptations in chlorophyll pigments have passed to the next generation  b innate variability because plants have evolved molecular differences to an environmental stimuli  c unselective adaptation because plants have evolved molecular differences to adapt to different wavelengths of light  d inclusive…
Watermelon snow” in Antarctica is caused by a species of photosynthetic green algae that thrives in subzero temperatures (Chlamydomonas nivalis). These algae are also found in high altitude year-round snowfields. In both locations, UV light levels tend to be high. Based on what you learned this week, propose an explanation for why this photosynthetic alga appears reddish-pink.
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