Term
| What are the two life cycle generations of a seedless plant? |
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Definition
| Gametophyte and Sporophyte |
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Term
| What reproductive structures are in the Gametophyte and which in the Sporophyte on a seedless plant |
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Definition
| Sperm egg and spores in Gametophyte, zygote in the Sporophyte |
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Term
| Is the gametophyte haploid or diploid and what does it produce? |
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Definition
| The gametophyte is haploid and produces gametes |
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Term
| What is the primary photosynthetic plant body in non-vascular plants such as liverworts and mosses? |
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Definition
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Term
| What is the ploidy of sporophytes, what reproductive structure do they produce, and what is the ploidy of these structures? |
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Definition
| Sporophytes are diploid and they produce haploid spores. |
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Term
| What is the evolutionary trend between gametophytes and sporophytes? |
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Definition
| The evolutionary trend is towards sporophyte being the dominant life cycle of land plants. |
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Term
| What is the role of sporophytes in bryophytes? |
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Definition
| Inconspicuous, small, contain little photosynthetic tissue, main function is spore production and dispersal. |
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Term
| What is the role of the sporophyte in vascular plants? |
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Definition
| In vascular plants the sporophyte is the dominant life cycle. It has leaves, roots and vascular tissue. |
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Term
| Where is the sporophyte in bryophytes? |
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Definition
| Within the gametophytic tissues. |
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Term
| Is a fern plant body sporophyte or gametophyte? |
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Definition
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Term
| In the bryophyte alternation of generations, what is the dominant life cycle? |
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Definition
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Term
| What is the structure called that bears the sexual organs of the bryophyte, and what are these sexual organs called? |
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Definition
| The gametangia, which are divided into antheridia (male) and archegonia (female) |
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Term
| After fertilization, what happens to the zygote in bryophytes? |
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Definition
| The zygote is not shed but is retained in the archegonium. The zygote, embryo and sporophyte are therefore carried on the gametophyte. |
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Term
What is this?
<img>http://cueflash.com/cardimages/answers/thumbnails/2/0/5302716.jpg</img> |
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Definition
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Term
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Definition
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Term
| From what does the calyptria of a Polytrichum moss develop? |
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Definition
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Term
| Is Polytrichum heterosporous or homosporous? |
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Definition
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Term
| Are moss spores a result of meiosis or mitosis? |
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Definition
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Term
| What does a moss have instead of roots? |
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Definition
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Term
| What structures are formed within antheridia? |
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Definition
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Term
| Are antheridia/sperm produced by meiosis or mitosis? |
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Definition
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Term
| If water is needed for fertilization, what does this suggest about the sperm cells of mosses? |
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Definition
| That they are naked sperm. |
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Term
| What does the peristome do and what comes out of it? |
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Definition
| The peristome opens like a mouth and spores come out |
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Term
| What is the dominant generation of a liverwort? |
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Definition
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Term
| What is the dominant phase of a fern life cycle? |
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Definition
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Term
| Are ferns homosporous or heterosporous? |
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Definition
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Term
| What do the haploid spores of ferns germinate into? |
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Definition
The haploid spores of ferns germinate into small and usually bisexual gametophytes which are photsynthetic and therefore independent. see:
http://year12biologyatsmc.wikispaces.com/file/view/_fern_proth40x.jpg/178474193/_fern_proth40x.jpg |
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Term
| What happens to the zygote of a fern after fertilization? |
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Definition
| It is retained in the archegonium. |
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Term
| What does a fern zygote develop into and where does it get its nutrition? |
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Definition
| A fern zygote remains in the archegonium where it develops into an embryo and gets its nutrition from the gametophyte. |
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Term
| What are fern leaves called? |
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Definition
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Term
Identify the following parts of a frond: pinna, pinnule, petiole and rachis:
http://nefern.info/jpgs/notaxa/frndprts.BMP |
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Definition
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Term
| What is the ploidy of spores in a fern sporangium? |
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Definition
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Term
| Is a gametophyte of a fern free living? |
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Definition
| Yes, because it falls off the fern. |
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Term
| What are the function of the rhizoids on a fern gametophyte? |
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Definition
| To attach the gametophyte to the sporophyte body. |
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Term
| Why would one not expect to find ferns in a xerophytic (dry) environment? |
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Definition
| Because fern sperm have to swim. |
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Term
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Definition
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