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38 Cards in this Set
- Front
- Back
he anthers of the flower produce ____ that form_____
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microspores--- male gametes (pollen)
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Ovules produce______
that form _______ |
megaspores--- female gametophytes (embryo sac)
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After its released from the anther, pollen is carried to the
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sticky stigma of carpel
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The pollen gram _____ from the stigma towards the ovary
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germinates (begins growing)
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a pore in the integuments of the ovule,
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microphyte
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When the pollen tube reaches the microphyte,
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it discharges two sperm cells into the female gametophyte.
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double fertilization- |
one sperm unites within the eggs to form a diploid zygote and
the other fuses with two nuclei in the large center cell of the female gametophytes |
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are
specialized shoots bearing the reproductive organs of the angiosperm sporophyte |
Flowers
|
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female part of the flower and its organs
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carpel
stigma style ovary |
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male bar to the flower and its organisms
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stamen
anther filament |
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Male gametophytes develop within the
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anthers
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female gametophytes develop within the
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ovaries
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brings male and female gametes together
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Pollination
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unisex plants
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Dioecious
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Plants mechanisms that prevent self-fertilization
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Diocious plants
cannot self fertilize they are unisex In some species stamens and carpals mature at different times Or they may be arranged so that it is unlikely that an animal pollination could transfer pollen from the anther to the sigma of the same flower |
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the ___ develops into a _____containing the embryo and supply nutrients
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The ovule
seed |
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After double fertilization the ovule develops_______
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into a seed
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After double fertilization the ______ develops into a seed
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ovule
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After double fertilization the ______ develops into into a fruit enclosing the seeds
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ovary
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Ater double fertilization the ovary develops into
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into a fruit enclosing the seeds
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The ovary develops into a fruit adapted for
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seed dispersal
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he wall of the ovary becomes the ____ the
thicken wall of the fruit while other parts of the flower wither or shed |
pericarp,
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the
thicken wall of the fruit while other parts of the flower wither or shed |
pericarp,
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In apples the
fleshy part of the fruit is derived mainly from the ______, while the core of the apple fruit develops from_____ |
swollen receptacle
the ovary |
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Fruits are
classified into several types depending on their developmental orgin |
Simple fruits are
derived from a single ovary Aggregated fruits such as a blackberry results from a single flower with several carpals |
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As a seed
matures, it dehydrates and enters a ________, condition of extremely low metabolic rate and suspension of growth and development |
dormancy phase
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condition of extremely low
metabolic rate and suspension of growth and development |
dormancy phase of seedlings
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Some seeds
germinate as soon as they are in a suitable environment |
water
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Other remain
dormant until some specific environmental cue causes then to break dormancy |
These include
fire, flood, cold, digestion |
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Germination of seeds depends on the uptake of water due to the
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lower water potential of the dry seed
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The causes the
expanding seed to rupture |
its seed coat and trigger metabolic changes in the
embryo that enable it to resume growth |
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many plants ___ themselves in asexual reproduction
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clone
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This occurs when
a part separates from the overall plant and eventually develops into a whole plant |
meristem cloning
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Asexual
reproduction is an extension of the capacity of plants for growth |
indeterminate
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Meristematic
tissues with dividing undifferentiated cells can ____ indefinitely but does not mean ____ |
sustain or renew growth
inmortality |
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__________-cells
throughout the plant can divide and differentiate into various types of specialized cells |
Parechyma
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These produce seeds without their flowers being
fertilized |
apomixis
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|
fertilization in apomixis
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A diploid cell in
the ovule gives rise to the embryo and the ovules mature into seeds |