Unit 8 Self-assessment test 1) Which of the following are parts of the gametophyte generation in mosses: antheridia, zygote, embryo, capsule, archegonia, sperm cells, egg cell, spores, and protonema? 2) How are mosses and liverworts similar? How is each group distinct? 3) What are plants believed to have evolved from? 4) What in common do plants share with algae? 5) What are the three groups of nonvascular plants? How would you determine 6) The nonvascular plants are believed to be true plants, just as ferns, conifers, and flowering plants are true plants; however, there are two tissues that the nonvascular plants do not have. Which two tissues? 7) What are some of the modifications necessary if an alga is to become evolutionarily adapted to living on land? Is a single modification sufficient, or 8) Which is the dominant generation in mosses? Why? are several necessary?
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The Deep Dive
Did you know that mosses are part of a larger group called Bryophytes, which also includes liverworts and hornworts? Traditionally, these nonvascular plants have been considered "primitive," but they play a crucial role in their ecosystems. Mosses help retain moisture, prevent soil erosion, and provide habitats for many tiny organisms. Plus, have you ever seen a pillow of moss? It’s basically nature’s own cozy blanket! When it comes to their evolutionary roots, both chlorophytes (green algae) and land plants share a common ancestor. This means they have similar cellular structures, such as chloroplasts, which allow them to perform photosynthesis! Plus, both groups are composed of eukaryotic cells and have cell walls made of cellulose. So, the beauty of a green landscape is really a historical reunion of sorts!
