b. C. d. prophyte depéndent on gametophyte Gametophyte dependent on sporophyte I
ID: 268295 • Letter: B
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b. C. d. prophyte depéndent on gametophyte Gametophyte dependent on sporophyte Independent sporophyte and gametophyte Sporophyte dominance Question 3 (1 point) The figure at right shows a sterile jacket of cells surrounding the zygote in Chara which you observed in lab. The lifecycle of Chara is best described as (circle one): ?plontic Diplontic Alternation of Generations of In this type of lifecycle, the zygote goes through melutle lusto form 4 hc How does this change when we go from Chara to the land plants? In what way did the retention of the egg in the sterile jacket in Chara enable this change? Station D, Grand Tour of the Plant "Tree": The last 2 points of your homework this week c from station D in your lab manual. Please make sure to fill in the key features and sketches n from the audio tour. Turn in this page at the beginning of your next lab.Explanation / Answer
Haplontic life cycle: Gametophyte is the predominant life form.
The sporophytic state is reduced.
Gametes are produced by mitosis.
Ex: Chara and Chlamydomonas
In haplontic life cycle, the diploid zygote undergoes MEIOTIC DIVISION to produce HAPLOID gametes.
Land plants display diplontic life cycle in which the diploid sporophyte is the dominant generation and the haploid gametophytic state is reduced to unicellular gametes only.
The retention of the egg in the jacket provides protection and nutrition to the zygote. In more developed plants, This resembles of ovules in the ovary which gets fertilzied by the pollen.
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