Biology 11
Name: ________________________ Date: _________ Block: _____
Seed Plants: Gymnosperms
Read pages 264-267 and answer the following questions:
| How are the gametophytes of seed plants different from those of algae, mosses and ferns?
What is a “seed?”
What are the 2 major groups of seed plants, and what do their names mean? (Hint: “vessel” = container)
Describe how gymnosperms produce their seeds
Describe how angiosperms produce their seeds
How do seeds help the plant survive?
Making Connections How is a seed different from a spore? (Hint: think of where a plant embryo comes from)
How do seeds make it easier for plants to survive on land?
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Gymnosperms (“naked seeds”) Angiosperms (“seeds in containers”)
Gymnosperms produce unprotected, or naked, seeds in conelike structures
Angiosperms produce seeds that are enclosed and protected inside the fruit, which is formed by the flower.
They resist desiccation (drying out) – they can survive even when it’s dry.
A seed results from fertilization (the union of 2 gametes), and is diploid, while a spore results from meiosis and is haploid.
When its too dry for a new plant to grow, a seed can wait until the conditions are right and then germinate and grow |
| What is another name for gymnosperms?
What environmental conditions are conifers adapted to survive in?
What is an important job that conifers and other trees do for the planetary ecosystem?
What percent of all wood used in building and construction do conifers provide?
Alternation of Generations in Gymnosperms Remember: Is a pine tree a gametophyte or a sporophyte?
What do the male cones on the pine tree produce?
What do the female cones on the pine tree produce?
What does pollen contain?
Remember: what do male gametophytes produce?
What happens when the male gamete from a pollen grain meets a female gamete? What does the seed contain?
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Conifers
Red cedar, white pine, western hemlock, Sitka spruce, Douglas fir, grand fir |
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