1. how does the gametophyte obtain its food(is it amotrophic or heterotrophic)? 2. how does the...
1. how does the gametophyte obtain its food(is it amotrophic or heterotrophic)?
2. how does the sporophyte obtain its food ( is it autotrophic or heterotrophic)?
3.which advantages do seeds have over spores?
Homework Answers
Ans 1) in angiosperms , the gametophyte obtain its food by mode of heterotrophic .
Fern Gametophyte - It is commonly called Fern prothallus . Fern gametophyte is autotrophic
moss gametophyte is also autotrphic in nutrition .
In gymnosperms , gametophyte obtains nutrition heterotrophically from the tree.
Ans 2) In angiosperms , the sporophyte obtain its food by mode of autotrophic
In Gymnosperms; the sporophyte obtains its food by mode of autotrophic.
In moss , sporophyte obtains its food heterotrophically.
In ferns , sporophyte obtains food by autotrophic mode of nutrition.
Ans 3) seeds are coated by a seed coat as protective layer that keeps them from dehydration so they last longer and they have the food suppy also.
- seeds can store more resources,
- seeds can slow down their metabolism, and exhibit dormancy also
Add Answer to:
1. how does the gametophyte obtain its food(is it
amotrophic or heterotrophic)?
2. how does the...
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51 Review questions: 1. Does the thallus contain vascular tisues? 2. 1s the thallus the gametophyte...
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ving questions about ferns: 1. Are the spores produced by the fern sporophyte formed by mitosis or meiosis? 2. Do the spores belong to the gametophyte or the sporophyte generation? 3. Are the gametes produced by mitosis or meiosis? 4. Are the archegonia and antheridia haploid or diploid? (HINT: Think about which generation produces them) 5. Is the dominant generation for the fern the gametophyte or the sporophyte? 6. Can you suggest an ecological role for ferns?
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1. What does the male gametophyte in flowering plants lack that we see in the male...
1. What does the male gametophyte in flowering plants lack that
we see in the male gametophyte in gymnosperms (e.g. pine)?
[answer]
2.
3.Double fertilization in flowering plants results in the
2N_____________ and the 3N _______________ . The 3N tissue is
important because it will provide ___________________ for the
growing seed.
4. A complete flower will have the following four parts (listed
in order below from the outer part of the flower inward):
_____________ , ______________, ______________ ,
_______________.
5....
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ving questions about ferns: 1. Are the spores produced by the fern sporophyte formed by mitosis or meiosis? 2. Do the spores belong to the gametophyte or the sporophyte generation? 3. Are the gametes produced by mitosis or meiosis? 4. Are the archegonia and antheridia haploid or diploid? (HINT: Think about which generation produces them) 5. Is the dominant generation for the fern the gametophyte or the sporophyte? 6. Can you suggest an ecological role for ferns?
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1. What does the male gametophyte in flowering plants lack that
we see in the male gametophyte in gymnosperms (e.g. pine)?
[answer]
2.
3.Double fertilization in flowering plants results in the
2N_____________ and the 3N _______________ . The 3N tissue is
important because it will provide ___________________ for the
growing seed.
4. A complete flower will have the following four parts (listed
in order below from the outer part of the flower inward):
_____________ , ______________, ______________ ,
_______________.
5....
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