BSC 1011C Exam 3 Ch. 24-26 Questions With Complete
Solutions
anther Correct Answers sac-like structure at the tip of the
stamen in which pollen grains are produced
Anthophyta Correct Answers phylum to which angiosperms
belong
Are gymnosperms monophyletic? Explain. Correct Answers
Gymnosperms are a paraphyletic group because angiosperms are
a sister group of one group of gymnosperms.
barcoding Correct Answers molecular biology technique in
which one or more short gene sequences taken from a well
characterized portion of the genome is used to identify a species
basal angiosperms Correct Answers a group of plants that
probably branched off before the separation of monocots and
eudicots
Based on fossil record, in what period did gymnosperm
dominate? When did the angiosperm surpass the gymnosperm?
Which are currently the most abundant plants? Correct Answers
Gymnosperms dominated in the Mesozoic Era. Angiosperm
surpasses gymnosperm in the late Cretaceous period.
Angiosperms are currently the most abundant plants.
calyx Correct Answers whorl of sepals
carpel Correct Answers single unit of the pistil
,Compared to seedless plants, seed plants dominate the land and
are found in diverse environments. What major adaptation is
most likely the cause of this success? Explain. Correct Answers
The major adaptation that is most likely the cause of this success
is reproduction not requiring water. Seed plants are
heterosporous, therefore allowing the megaspores and
microspores to develop into eggs and sperm, respectively.
Because the gametophytes mature within the spores, they are not
free-living, as are the gametophytes of other seedless vascular
plants.
conifer Correct Answers dominant phylum of gymnosperms
with the greatest variety of trees
corolla Correct Answers collection of petals
cotyledon Correct Answers primitive leaf that develops in the
zygote; monocots have one cotyledon, and dicots have two
cotyledons
crop Correct Answers cultivated plant
cycad Correct Answers gymnosperm that grows in tropical
climates and resembles a palm tree; member of the phylum
Cycadophyta
Define a perfect flower. Is self-pollination common in perfect
flowers? Explain. Correct Answers A perfect flower is one that
carries both stamens and carpels. Self-pollination is actually not
common, only a few species of angiosperms do so, because
, cross pollination is promoted by anatomical and environmental
barriers and increases genetic diversity.
Define flower. Define fruit. (Make sure to include the purpose.)
What are the evolutionary advantages of these two structures? In
what plant group(s) are they found? Correct Answers Flower:
The reproductive structure that provides a mechanism for the
union of sperm with eggs. They are found in angiosperms, and
the evolutionary advantage is that it allows fertilization and
embryo development to be largely sheltered from the
environment.
Fruit: Mature, ripened ovary, alongside the contents of the
ovary. They are found in angiosperms, and the evolutionary
advantages are that it protects the seed and often ensures its
dispersal over a wide geographical range.
Define integument. Correct Answers An integument is the layer
of sporophyte tissue that surrounds the megasporangium and
then later the embryo.
Define lichen. What are the three types? Correct Answers
Lichen are a fungus living in a symbiotic relationship with an
alga or cyanobacterium (or both in some instances). The three
types are foliose, fruticose, and crustose.
Define sporophyll. Give an example. Correct Answers
Sporophylls are modified leaves that produce sporangia and
partially shelter gymnosperm seeds. An example is Lycophytes.
Describe at least 2 fungal parasite or pathogen of plants. Correct
Answers Claviceps purpurea causes ergot, a disease of cereal
Solutions
anther Correct Answers sac-like structure at the tip of the
stamen in which pollen grains are produced
Anthophyta Correct Answers phylum to which angiosperms
belong
Are gymnosperms monophyletic? Explain. Correct Answers
Gymnosperms are a paraphyletic group because angiosperms are
a sister group of one group of gymnosperms.
barcoding Correct Answers molecular biology technique in
which one or more short gene sequences taken from a well
characterized portion of the genome is used to identify a species
basal angiosperms Correct Answers a group of plants that
probably branched off before the separation of monocots and
eudicots
Based on fossil record, in what period did gymnosperm
dominate? When did the angiosperm surpass the gymnosperm?
Which are currently the most abundant plants? Correct Answers
Gymnosperms dominated in the Mesozoic Era. Angiosperm
surpasses gymnosperm in the late Cretaceous period.
Angiosperms are currently the most abundant plants.
calyx Correct Answers whorl of sepals
carpel Correct Answers single unit of the pistil
,Compared to seedless plants, seed plants dominate the land and
are found in diverse environments. What major adaptation is
most likely the cause of this success? Explain. Correct Answers
The major adaptation that is most likely the cause of this success
is reproduction not requiring water. Seed plants are
heterosporous, therefore allowing the megaspores and
microspores to develop into eggs and sperm, respectively.
Because the gametophytes mature within the spores, they are not
free-living, as are the gametophytes of other seedless vascular
plants.
conifer Correct Answers dominant phylum of gymnosperms
with the greatest variety of trees
corolla Correct Answers collection of petals
cotyledon Correct Answers primitive leaf that develops in the
zygote; monocots have one cotyledon, and dicots have two
cotyledons
crop Correct Answers cultivated plant
cycad Correct Answers gymnosperm that grows in tropical
climates and resembles a palm tree; member of the phylum
Cycadophyta
Define a perfect flower. Is self-pollination common in perfect
flowers? Explain. Correct Answers A perfect flower is one that
carries both stamens and carpels. Self-pollination is actually not
common, only a few species of angiosperms do so, because
, cross pollination is promoted by anatomical and environmental
barriers and increases genetic diversity.
Define flower. Define fruit. (Make sure to include the purpose.)
What are the evolutionary advantages of these two structures? In
what plant group(s) are they found? Correct Answers Flower:
The reproductive structure that provides a mechanism for the
union of sperm with eggs. They are found in angiosperms, and
the evolutionary advantage is that it allows fertilization and
embryo development to be largely sheltered from the
environment.
Fruit: Mature, ripened ovary, alongside the contents of the
ovary. They are found in angiosperms, and the evolutionary
advantages are that it protects the seed and often ensures its
dispersal over a wide geographical range.
Define integument. Correct Answers An integument is the layer
of sporophyte tissue that surrounds the megasporangium and
then later the embryo.
Define lichen. What are the three types? Correct Answers
Lichen are a fungus living in a symbiotic relationship with an
alga or cyanobacterium (or both in some instances). The three
types are foliose, fruticose, and crustose.
Define sporophyll. Give an example. Correct Answers
Sporophylls are modified leaves that produce sporangia and
partially shelter gymnosperm seeds. An example is Lycophytes.
Describe at least 2 fungal parasite or pathogen of plants. Correct
Answers Claviceps purpurea causes ergot, a disease of cereal
