Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
32 Cards in this Set
- Front
- Back
|
this type of angiosperm has fibrous roots, veins scattered in stems, leaf venation parallel, herbaceous, floral parts in multiples of three
|
monocots
|
|
|
this type of angiosperm has tap roots, veins form ring in stem, leaf venation netlike, herbaceous or woody, floral parts in multiples of four or five
|
eudicots
|
|
|
all four whorls present
|
complete
|
|
|
one or more whorls missing
|
incomplete
|
|
|
(bisexual) both stamens and carpels present
|
perfect
|
|
|
(unisexual) stamens or carpels missing
|
imperfect
|
|
|
80% of the world's flowering plants have (perfect or imperfect) flowers
|
perfect
|
|
|
what are some benefits or cross pollination? (2)
|
1. increased genetic variability
2. improved fitness (fewer deleterious or lethal mutations) |
|
|
spatial separation of anthers and stigmas is a way plants can prevent what?
|
self-fertilization
|
|
|
stamens and carpels mature at different times is this form of avoidance of self fertilization
|
temporal separation
|
|
|
stamens mature before carpels
|
protandry
|
|
|
carpels mature before stamens
|
protogyny
|
|
|
an imperfect flower with no stamens is called...
|
carpellate
|
|
|
an imperfect flower with no carpels is called...
|
staminate
|
|
|
"one house" separate male and female flowers on the same plant
|
monoecious
|
|
|
""two houses" separate male and female flowers on different plants
|
dioecious
|
|
|
describe the formation of female gametophyte
|
1. megasporocyte inside the ovule undergoes meiosis resulting in four megaspores
2. three of the megaspores degenerate 3. the surviving megaspore divides by mitosis to form eight nuclei 4. the eight nuclei segregate to form seven cells. |
|
|
describe the formation of a male gametophyte
|
1. many microsporocytes reside inside anther
2. a microsporocyte divides by meiosis resulting in 4 cells called microspores. Each microspore divides once by mitosis forming the tube cell and generative cell. 3. The two resulting cells mature into a single pollen grain containing an immature male gametophyte. The generative cell will later divide to form sperm |
|
|
what are the spores produced by seed plant sporophytes
|
microspores and megaspores
|
|
|
a set of floral characteristics related to pollination that form a recognizable pattern
-flower color, shape, size - presence/ absence of floral parts -position of floral parts - presence/ absence of nectar or scent -quantity of pollen -quantity, concentration of nectar |
pollination syndromes
|
|
|
zygote divides mitotically, develops into embryo
|
post fertilization
|
|
|
triploid cell divides mitotically to form what?
|
endosperm (nutritive tissue)
|
|
|
ovule matures into... and develops?
|
seed , tough seed coat
|
|
|
ovary wall develops into..
|
fruit
|
|
|
describe the process of embryogenesis
|
1. zygote divides into two daughter cells
2. two daughter cells divide into a cell mass and a string of single cells 3. embryo divides and forms progenitors of the three adult tissues 4. 3 tissue types mature into root and shoot systems. long axis of the mature embryo becomes apparent |
|
|
name of ovary wall
|
pericarp
|
|
|
this group of angiosperms has 1 cotyledon that transfers nutrients from endosperm to embryo; some store large amounts of endosperm
|
monocots
|
|
|
this group of angiosperms has 2 cotyledons, usually large and fleshy; enclose the embryo; endosperm lacking or nearly absent
|
eudicot
|
|
|
this consists of embryo, food supply (endosperm in monocots or cotyledons in eudicots), and a seed coat
|
mature seed
|
|
|
how much water do most seeds contain?
|
5-20%
|
|
|
what are the 4 germination requirements?
|
1. water (splits seed coat, rehydrates embryo, synthesis of enzymes)
2. temperature 3. oxygen 4. light |
|
|
first thing to emerge when seed splits,anchors seed in soil, begins absorbing water and nutrients
|
radicle
|
