Weigh out 5g portions of Sphagnum, a true sponge, an artificial sponge and a pap

Question

Weigh out 5g portions of Sphagnum, a true sponge, an artificial sponge and a paper towel. Add 250 ml of water to four separate beakers. Label the beakers Sphagnum, true sponge, artificial sponge, and paper towel. Add to the appropriate beakers the 5g portions of, a true sponge, an artificial sponge, and a paper towel. Allow the material to sit in the beaker for two minutes, then remove the materials from each beaker. Pour the water left over from each beaker into the 100ml cylinder, and record your measurements for each material. Record your observations in Table20.1, and in the space provided, discuss your findings. Describe two ways in which mosses can reproduce. Why was sphagnum successful as a bandage in world t? Where can Polytrichum sp. be found?

Explanation / Answer

1. Moss reproduces both sexually and asexually. For sexual reproduction, plants produce a male and female structure, often on different plants, and the sperm swims towards the eggs to accomplish fertilization. In the case of asexual reproduction, any time part of the stem or even just a leaf breaks off, the bits regenerate to create a new moss plant.

2. Sphagnum moss was used as a bandage during the Civil War to wrap around gun wounds. It has excellent antiseptic properties and also highly absorbent, much more than cotton.

3. Polytrichum sp. is commonly found in sunny areas, with little to no shade, and can withstand exposure to the sunlight provided that the soil remains moist. Since Polytrichum Sp. are common on organic soils with persistent moisture, they are frequently found in bogs and swamp sites where they can become quite large in size.

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