22-2 bryophytes definition: small, seedless, non-vascular plants –non-vascular: lack special...
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22-2 Bryophytes• Definition: small, seedless, non-vascular plants
– Non-vascular: lack special tissues that carry H2O and nutrients throughout plant
• Habitat: found on land near streams, rivers, or other moist, shaded areas
• Most common are the mosses
22-2 Mosses
• Well adapted to life in these habitats:
– Wet habitats (mosses need plentiful H2O for reproduction)
– Nutrient-poor soils (mosses often called “pioneer plants” because they live on bare rock and help accumulate soil needed for other plants)
– Harsh habitats (mosses are most abundant plants in polar regions)
22-3 Seedless Vascular Plants
• Most common are the ferns– Thrive in areas with a lot of moisture and little
light
22-3 Seedless Vascular Plants
• Vascular tissue – special tissues that carry H2O and nutrients throughout plant– Xylem – carries H2O upward from roots to rest
of plant– Phloem – carries nutrients and sugars
throughout plant• ** Both types can carry materials against the force
of gravity
Draw “Alternation of Generations” picture
• Arrange paper in six sections as shown in class• Title the upper left and upper middle squares “Alternation of Generations”• Draw figure 22-2 on p. 552. Draw it on the upper left hand square of your six-sectioned paper• Write the caption for picture underneath your drawing• On upper middle square, define: haploid, diploid, gametophyte and sporophyte
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