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30 Cards in this Set
- Front
- Back
When pollen from one species lands on the stigma of a flower from another species |
the pollen tube typically does not develop |
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Unlike in animal meiosis, meiosis in plants gives rise to |
haploid spores |
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the micropyle is |
a small opening at one end of an ovule |
|
In a flower, an anther is typically at the tip of a(n) |
filament |
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Meiosis in flowering plants gives rise to cells that are |
haploid gametophytes |
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A plant species where each plant can only make either male or female flowers is called a ______ species and always has ______ flowers. |
dioecious; imperfect |
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In the flower diagram shown, the item labeled "5" is the |
stigma |
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Studies have shown that in the flowering plant Arabidopsis the development of parts of a flower is governed by |
the expression patterns of several floral organ homeotic genes |
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The female gametophyte in flowering plants is the |
embryo sac |
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In flowering plants an ovary is part of a(n) |
carpel |
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A fruit that develops from several ovaries in a single flower, such as a raspberry, is called a(n) |
aggregate fruit |
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The innermost whorl of a flower typically consists of one or more |
carpels |
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Along with the egg, in the part of an embryo sac next to the micropyle you should find |
synergids |
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A flower with petals, sepals, and one carpel but no stamens is |
imperfect and incomplete |
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For a typical flowering plants, the first cell of the triploid (3n) endosperm is formed from |
one sperm fused with the central cell |
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The embryonic root, which is where the pollen tube enters the ovule prior to fertilization, is called the |
radicle |
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In seeds, the shift from active metabolism to dormancy, and then reactivation and germination is based on levels of |
abscisic acid |
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In flowering plants how many egg cells are typically produced from each megaspore mother cell? |
1 |
|
In flowering plants |
the gametophytes are smaller than the sporophytes and do not nourish themselves |
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The female reproductive whorl of a flower typically consists of one or more |
carpels |
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After fertilization in flowering plants, an embryo in a seed |
is always a sporophyte |
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Once a pollen tube lands on a compatible stigma |
chemical cues guide the pollen tube from the stigma to the embryo sac of an ovule |
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A flower must have one or more _____ to be able to make seeds |
carpels |
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In the flower diagram shown, the item labeled "3" is a(n) |
filament |
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In the flower diagram shown, the item labeled "4" is a(n) |
anther |
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Which of the following is the most typical order of events in seed germination? |
water imbibition-seed coat splits-root cells divide and elongate-shoot cells divide and elongate |
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In flowering plants how many sperm cells are typically produced from each microspore mother cell? |
8 |
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Which of the following occurs for the production of a pollen grain from a microspore mother cell? |
meiosis, then mitosis |
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The process of asexual reproduction where a diploid embryo develops from an unfertilized egg or from diploid cells in ovule tissue is called |
apomixis |
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Many fully differentiated plant cells are totipotent, meaning that they |
have the potential to form a whole, fully-functional plant |