Angiosperms
34 important questions on Angiosperms
Flowers serve what purpose for plants?
What did flowers evolve from
Nearly all angiosperms (flowering plants) are?
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What are the floral whorls?
corolla
stamens
pistil(s)
Sexual reproduction in Angiosperms involves what processes?
How were early angiosperms pollenated? how was this achieved?
During evolution many flowering plants developed what vectors?
How have floral structures changed during evolution?
- Some flowers lack one or more of the floral whorls.
- One floral whorl may have become fused to another.
- Floral symmetry has changed in some plants.
- In some plants specialized structures have developed to attract pollinators (e.g. nectaries).
How do todays wind pollinated flowers differ from animal vector flowers?
What is the largest family of angiosperm?
Orchid flowers are specialized in what way?
What are the clusters or grouping argument some flowers have called?
Pollen grains (microspores) are produced where?
Technically the pollen grain is what?
When pollen matures the anthers crack open. what is the flower said to be at this point?
What is the exterior coat most pollen grains have called?
What type of fertilization is unique to angiosperms?
What are the typical products of double fertilization? include nuclei counts.
The Family Lilium (lily) produces what via double fertilization ?
Name some mechanisms that enhance cross pollination
odor
landing platforms
sign posts
nectar (caloric reward)
unisexual flowers (dioecious plants)
traps
sexual mimicry
thermogenesis (in arums)... what ever arums are.
What are the three ways angiosperm flower structors can be organized?
perigynous (structures are attached around the ovary
epigynous (structures are attached above the ovary).
What makes up the calyx? where is it located typically? what is the function?
sepals
outer most whorl
protection while in bud form can be petaloid and attract vectors
What makes up the corolla? location? function?
second to uttermost whorl.
attraction of vectors and generally assist in reproduction (plant specific )
What makes up the androecium? location? function?
third to outermost whorl
produce pollen - male reproductive part of a flower
What makes up the pistil? location? function?
inner most whorl
houses the ovules
What is a hypanthium? what type of plants have them?
What comprises a stamen?
What is a stigma?
In relation to flower structure, what is meant by Perfect?
Flower structure- What does imperfect mean?
Flower structure- what does dioecious mean?
What is an "incomplete" flower?
Ovules remain attached where until mature?
What is placentation? why is it important?
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