CK12 Life Science

Themosses,phylum Bryophyta, are most often recognized as the green “fuzz” on damp rocks and trees in a forest. If you look close ...

Figure 10.9: In hornworts, the “horns”, the sporophytes are rise up from the leaflike game- tophyte. ( 5 ) Figure 10.10: Liverwo ...

are now extinct, but their smaller relatives still remain. Seedless vascular plants include the club mosses, the ferns, the hors ...

Figure 10.12: Ferns are common in the understory of the tropical rainforest. ( 14 ) Figure 10.13: The first leaves of most ferns ...

Figure 10.14: Horsetails are common in marshes. ( 20 ) Figure 10.15: Whisk ferns have no leaves and bear yellow sporangia. ( 21 ...

Reproduction of Seedless Plants Seedless plants can reproduce asexually or sexually. Some seedless plants, like hornworts and li ...

Why Seedless Plants Are Important The greatest influence of seedless plants on human society was in the formation of the fossil ...

Compare and contrast the fern gametophyte and sporophyte. Compare and contrast the whisk fern (Psilophyta) and the ferns (Ptero ...

10.3 Lesson 10.3: Seed Plants Lesson Objectives Describe the importance of the seed. Explain the ways in which seeds are disper ...

seed to a new location. Or if you look under the scales of pine cone, you would see tiny seeds with “wings” that allow these see ...

Figure 10.19: Fleshy fruits aid in seed dispersal since animals eat the fruits and carry the seeds to a new location. ( 26 ) Cy ...

Figure 10.20: A red pine, which bears seeds in cones, is an example of a conifer. ( 18 ) Figure 10.21: The end of a pine tree br ...

the Dinosaurs (about 65 to 200 million years ago) the cycads were the dominant plants. So you can imagine dinosaurs grazing on c ...

Figure 10.23: Ginkgo trees are gymnosperms with broad leaves. ( 10 ) Figure 10.24: One type of gnetophyte isWelwitschia. ( 7 ) ...

Figure 10.25: Angiosperms are the flowering plants. ( 16 ) Even though flowers may differ widely in their appearance, they do ha ...

Table 10.1: (continued) Flower part Definition filament Stalk that holds up the anther. anther The pollen-containing structure i ...

Figure 10.26: A complete flower has sepals, petals, stamens, and one or more carpels. ( 32 ) Review Questions Why are seeds an ...

anther The pollen-containing structure in a flower. calyx The sepals collectively; outermost layer of the flower. carpel “Female ...

10.4 Lesson 10.4: Plant Responses Lesson Objectives List the major types of plant hormones and the main functions of each. Defi ...

Table 10.2: (continued) Hormone Function Cytokinins Promote cell division; prevent senescence Abscisic Acid Close the stomata ; ...