An Angiosperm Life Cycle: Flowering Plant Reproduction
angiosperms are best described as: Flowering nonvascular plants Seedless nonvascular plants Flowering vascular plants Vascular plants that produce naked seeds Seedless vascular plants
Flowering vascular plants
when does the diploid stage start?
once an egg has been fertilized by a sperm
what will happen when gametophytes have fully developed?
they will produce gametes
flowers
which are specialized structures for reproduction
megaspore
which will develop into the female gametophyte and is much larger than the male spore
microspore
will develop into the male gametophyte and is much smaller than the female spore
what can angiosperms be either?
can be either be unisexual or bisexual, meaning that some flowering plants contain only male or female structures, while others contain both male and female structures
Angiosperms
flowering vascular plants
what are the roots of angiosperm?
from two Greek words: 'angio,' which means 'container,' and 'sperm,' which means 'seed.
what are the first structures in the haploid stage?
the microspore and the megaspore
what will eventually become the multicellular female gametophyte?
the ovary
what will happen until fertilization occurs?
the union of the egg and sperm - the cells remain in the haploid stage.
double fertilization
A fertilization process that requires two sperm to fuse with two other cells
The mature microgametophyte is produced in which structure? Stigma Pollen grain Ovary Anther Sepal
Anther
Which of the following best describes the dominant life stage in angiosperms? Haploid sporophyte Triploid sporophyte Diploid gametophyte Diploid sporophyte Haploid gametophyte
Diploid sporophyte
Which structure is a result of double fertilization and provides a food sources for the developing embryo? Ovary Sporophyte Flower Pollen grain Endosperm
Endosperm
In the angiosperm, which of these structures is responsible for producing the female gametes? Microsporangium Megagametophyte Megasporangium Microgametophyte
Megagametophyte
when will pollination occur?
\when the pollen grain lands on the female structures in a flower
what does the combination of the haploid sperm cell with a double nucleus create?
a cell that actually has three copies of genetic information
endosperm
becomes the food source for the developing embryo
what is the male gametophyte in angiosperms?
is the pollen and develops in the anther of the flower
what will the developing embryo do?
it will use this source of food and eventually develop into a mature sporophyte
what will the female and male parts of the flower produce?
megaspores, and the male parts will develop microspores, continuing this cycle.
