Gymnosperms, Angiosperms and Plant Life Cycles

Name: Gymnosperms, Angiosperms and Plant Life Cycles
Author: StemPy Lab

Seed plants with naked and with enclosed seeds, double fertilisation, and the three patterns of life cycle that link the haploid and diploid generations.

3 lessons, about 1 h 25 min3 simulations10 problems4 practice questionsPython in every lesson

Created by StemPy Lab

Course outline (3 lessons)

Lesson 1about 30 min
Gymnosperms
Gymnosperms bear ovules that lie open on scales, so their seeds are naked. They are trees and shrubs with tap roots, often helped by fungi (Pinus) or cyanobacteria (Cycas). They are heterosporous: male cones make pollen grains, and ovules hold a many-celled female gametophyte. Both gametophytes stay on the sporophyte.
1 simulation1 practice question1 Python program3 problems
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Lesson 2about 30 min
Angiosperms
Angiosperms are the flowering plants: their ovules lie inside an ovary, and their seeds form inside fruits. They are dicotyledons or monocotyledons. The embryo sac has 7 cells and 8 nuclei. In double fertilisation, one male gamete fuses with the egg and the other with the two polar nuclei, which gives the triploid endosperm.
1 simulation2 practice questions1 Python program4 problems1 Python lab
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Lesson 3about 25 min
Life cycles and alternation of generations
Plants alternate between a haploid gametophyte, which makes gametes, and a diploid sporophyte, which makes spores by meiosis. In haplontic cycles the gametophyte is the main body; in diplontic cycles the sporophyte is; in haplo-diplontic cycles both are many-celled. Most algae are haplontic, bryophytes and pteridophytes are haplo-diplontic, and seed plants are diplontic.
1 simulation1 practice question1 Python program3 problems1 Python lab1 question set1 note
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More onDiversity of Living Organisms › Gymnosperms and Angiosperms Diversity of Living Organisms › Plant Life Cycles and Alternation of Generations

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Gymnosperms, Angiosperms and Plant Life Cycles

Course outline (3 lessons)

Gymnosperms

Angiosperms

Life cycles and alternation of generations

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