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2. Place both plants in a spot where they both receive the same amount of sun, warmth and humidity. All About Plant Adaptation 3. Water them with their special water and observe them every day or two. Write down any changes you see in the data table. Investigation Data Sheet Minerals & Bog Plants 4. Draw a diagram below of the specialized leaf structure of the Venus flytrap. The Venus flytrap’s bug-eating jaws are an ingenious adaptation to poor growing conditions. The soil in a boggy coastal plain lacks nutrients and the water is strongly acidic, like vinegar. That makes it hard for the plants to get the minerals needed to grow healthy and strong. Fortunately, the necessary minerals can be found nearby, flying just overhead. Through many generations, the plants have evolved their fascinating leaf structure to catch flies and other small insects to digest in order to gain these important nutrients. The leaves of the Venus flytrap adapted into a two-sided trap with a hinge between and trigger hairs inside. The hairs sense when something is between them and close. Objective Conclusions Examine the relationship between the Venus flytrap, soil and water. • What do all plants need to grow and reproduce? Where do most plants get the minerals they need? Materials — two Venus flytrap plants — tap water — pure, mineral-free water (either distilled or rainwater) — two containers or watering cans — labels — a sunny, humid spot • Tap water is full of chlorine, fluoride and calcium. Why do you think tap water is toxic to bog plants and makes them sick? • Describe these plants and the different adaptations that allow them to get what they need to survive. What do you notice about the leaves? Stems? Flowers? Procedure 1. Label the plants (A) and (B) to remind you that one should receive only tap water and one should receive only distilled water. (It is useful to label the watering cans or containers, too, so they don’t get mixed up.) Plant A – Pure Water Plant B – Tap Water Day 1 Day 3 Day 5 Day 7 Day 9 Day 11 Day 13 www.LibraryVideo.com © 2005 Library Video Company. All rights reserved.