Science 6 Q2-W7-D1_Parts of Fern.pptx

spore bearing plants

1. FERN MOSS

2. FERN

3. Spore- are the reproductive structure of plants that is non-flowering and seedless.

4. What are the different examples of plants that belong to spore-bearing plants? Ferns Moss What are spore-bearing plants? * Plants with spore, the reproductive organ of spore-bearing plants

5. The structure of a fern Ferns have 3 major parts – the rhizome , the fronds and the reproductive structures called sporangia . The characteristics of each of these 3 parts of the fern plant are used for classification and identification. The rhizome is the stem of the fern plant. It comes in 3 basic forms: An erect rhizome, which is a solid mass that gives rise to a tuft of fronds. You can see this type of rhizome on a king fern or a crown fern. A laterally growing rhizome that creeps along or under the ground. It may even climb up a tree. Hound’s tongue and thread ferns are examples of a fern with a creeping rhizome. A vertical rhizome. This can grow into a short or a tall trunk. The trunk of the ponga (silver fern) is a vertical rhizome.

6. The fronds are the leaves of the fern. There is usually a stalk (the stipe) with a flat blade (the lamina), often divided into segments. The frond may be simple and undivided or it may be divided into a number of divisions (called pinnae). New fronds are produced from the rhizome. They are tightly coiled into a spiral (called a fiddlehead or koru), and these slowly uncoil as they mature. Fronds have a dual function. They are there for photosynthesis but they are also there for reproduction. The leafy fern plants we see in the bush that produce spores are sporophytes. When the spores are released by the sporangia, if they land in a hospitable environment, they can grow into a tiny plant – the gametophyte. This inconspicuous, short-lived plant has 2 sets of reproductive organs – the antheridia (male) and the archegonia (female). In suitably moist conditions, fertilisation takes place either on the same gametophyte or an adjacent one. Fertilisation gives rise to a new sporophyte.

7. Identify what part of the fern is being describe. It is the underground stem of the fern. 2. What do you call the whole fern leaf? 3. It is the stalk below the blade. 4. The uncurling frond of a fern. 5. This part of the fern is found under the pinna.

8. 6. ______ 7. ______ 8. _______ 10. ______ 9. ______