Ch. 29: Plant Diversity I --- How Plants Colonized Land
1. --- Land plants evolved from Green Algae ---:
2. Plants are most closely related to which group of green algae <answer> Plants
are most closely related to the charophytes.
3. Provide some evidence for the relatedness of plants and charophytes. <answer> -
Plants and charophytes...
fhave RINGS of proteins which synthesize cellulose. (Other protists synthesize cellulose
in linear proteins.)
fplants that have flagellated sperm have sperm which is similar to charophyte sperm.
fshare the otherwise unique formation of a phragmoplast during cell division.
fpossess similar DNA sequences
4. What is a phragmoplast <answer> A Phragmoplast is a microtubule structure
which forms between the two nuclei of a dividing cell.
A cell plate forms at the middle of the phragmoplast, giving rise to a new cross wall that
separates the daughter cells.
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, Phragmo = fence Plast
= builder
5. In charophytes, what durable polymer layer prevents exposed zygotes from drying
out <answer> Sporopollennin prevents charophyte zygotes from drying out.
Sporopollenin walls also encase plant spores!
6. Land plants are also known as............. embryophytes
(because of their multicellular dependent embryos)
7. List some derived traits of plants which are not shared by charophytes....................f
Alternation of Generations fMulticellular,
dependent embryos. fWalled spores
produced in sporangia. fMulticellular
gametangia
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1. --- Land plants evolved from Green Algae ---:
2. Plants are most closely related to which group of green algae <answer> Plants
are most closely related to the charophytes.
3. Provide some evidence for the relatedness of plants and charophytes. <answer> -
Plants and charophytes...
fhave RINGS of proteins which synthesize cellulose. (Other protists synthesize cellulose
in linear proteins.)
fplants that have flagellated sperm have sperm which is similar to charophyte sperm.
fshare the otherwise unique formation of a phragmoplast during cell division.
fpossess similar DNA sequences
4. What is a phragmoplast <answer> A Phragmoplast is a microtubule structure
which forms between the two nuclei of a dividing cell.
A cell plate forms at the middle of the phragmoplast, giving rise to a new cross wall that
separates the daughter cells.
1/
13
, Phragmo = fence Plast
= builder
5. In charophytes, what durable polymer layer prevents exposed zygotes from drying
out <answer> Sporopollennin prevents charophyte zygotes from drying out.
Sporopollenin walls also encase plant spores!
6. Land plants are also known as............. embryophytes
(because of their multicellular dependent embryos)
7. List some derived traits of plants which are not shared by charophytes....................f
Alternation of Generations fMulticellular,
dependent embryos. fWalled spores
produced in sporangia. fMulticellular
gametangia
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