Phloem PDF
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Summary
This document discusses the evolution of land plant anatomy, focusing on critical characteristics like water maintenance, gas exchange, and support for obtaining light. It also introduces vascular tissues, specifically xylem and phloem, and their roles in plant transport.
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How has land plant anatomy evolved? • Critical Characteristics Include: -maintenance of cell water. -gas exchange in air and not in water. -physical support so that the plant can obtain light. [nutrient translocaton] -the ability to acquire nutrients from soil rather than water. -the ability to repr...
How has land plant anatomy evolved? • Critical Characteristics Include: -maintenance of cell water. -gas exchange in air and not in water. -physical support so that the plant can obtain light. [nutrient translocaton] -the ability to acquire nutrients from soil rather than water. -the ability to reproduce on land. -the ability to control and coordinate growth. Vascular Tissues • Conducting tissues: • Xylem (transports water and minerals) • Phloem • Products of photosynthesis • Hormones and other organic molecules
