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AP Biology: Chapter 38-39 Test
Terms in this set (41)
a seed develops from____
the ___ is the female part of the flowering plant___
carpel (or pistil)
where is the microsporangia located?
what example from the powerpoint is the accessory fruit?
what is a complete flower?
contains all four parts, carpels, sepals,stamen and petals
what is the sticky part of the plant where pollen lands>?
what is the endosperm?
the food storing endosperm is derived from the cell that contains two polar nuclei and one sperm nucleus
where is the pollen released from?
where does meiosis occur in a flowering plant?
microspores and megaspores
what 2 word term do we call the female gametophyte?>
what 2 word term do we call the male gametophyte of a flowering plant?
what is an example of a multiple fruit?
pollination is the transfer of pollen from the ____ to the ____
anther to the stigma
what results from double fertilization?
diploid embryo and triploid endosperm
the embryo of a grass seed has two protective sheets a ____ whcih covers the young shoot and a ___ which covers the root?
coleoptile and colerohiza
in plants what could be an advantage of sexual reproduction as opposed to asexual reproduction?>
fruit is the ripened ___ of the angiosperm
de etiolation is informally known as____
what physically happens to plant cells as they bend toward the light?
cell expansion is greater on teh dark side of the stem
where do we find most auxin in a plant bending toward the light?
on the shaded side
what caused the ripening of fruit and the dropping of leaves and fruit
IAA is what?
which plant growth regulator is found in rapidly growing parts of the plant i.e. embryo , roots, fruit?
what promotes dormancy and drought tolerance
auxin triggers the ____ of cell walls
which hormone is involved in the fruit growth?
what enzyme becomes activated in the acidic cell wall?
what becomes separated by expansins?
microfibrils cross linked by polysaccharides
____ are so named because they stimulate cytokinesis?
__ favor rooting?
___ favor shooting?
you are culturing a plant in a test tube what happens when cytokinins are present but no auxin?
no growth will occur because cytokinins and auxin need to work together.
you are culturing a plant in a test tube what happens when your auxin to cytokinin ratio is high?
roots will form
what would you want to treat a plant with to promote growth?
name one way of getting rid of ABA?
heavy rains water, prolonged cold and light
if you were shipping green bananas to a super market thousands of miles away which chemical woudl you want to eliminate?
a short day plant will only flower when?
nights are longer than a certain critical value
__ cycles about 24 hours long and are governed by an internal clock?
phytochrome conversion marks ____ and ___ providing biological clocks with environmental cues
sunrise and sunset
name two ways plants combat predators?
thorns, producing distasteful compunds to deter the predators, recruiting predators to kill the animal killing the plant
systematic aquired resistance is induced by
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