ch. 37 - reproduction in flowering plants
what is the example of a seed dispersed by water
coconut
special structures found in seeds that are dispersed by ants are called
elaiosomes
in most developing dicot seeds, the primary source of nutritive material is in the
endosperm
the fusion of a sperm cell with two polar nuclei in the ovule forms the
endosperm
apomixis refers to a type of sexual reproduction
false- asexual
as a seed develops from an ovule, the ovule wall enlarges and develop into a
fruit
sexual reproduction results in
genetic diversity among offspring
the absorption of water by a dry seed is known as
imbibition
flowers that are strongly oderiferous and blue or UV purple in color would most likely be pollinated by
insects
most flowers are pollinated by which method
insects
which of the following is an example of a modified underground bud with fleshy leaves for storage
onion
endosperm is usually triploid
true
plants that produce scentless, inconspicuous flowers with enormous amounts of pollen are adapted to which type of pollination
wind
which statement about the megasporocyte is true
it is a diploid cell located within an ovule
which part of a flowering plant is the immature male gametophyte
pollen grain
each pollen grain produces two cells, one of which may develop into a
pollen tube
following double fertilization, the ovule develops into a ____, and the ovary develops into a _____.
seed, fruit
the order of whorls from the flower's periphery to the center
sepals, petals, stamens, and carpels
the diploid portion of a plant life cycle is known as the
sporophyte generation
rhizomes, tubers, corms, and stolons are examples of modified
stems
the female plant structure on which a pollen grain must land for sexual reproduction to occur is the
stigma
the function of cotyledons in many plants is to
store food reserves
which statement about asexual reproduction is true
the offspring of asexual reproduction are genetically identical to the parent
endosperm tissue is
3n
compare and contrast the processes of pollination and fertilization
both processes involve the bringing together of structures. pollination is the transfer of pollen from an anther to a stigma. fertilization is the fusion of a sperm and egg, and in flowering plants there is a second "fertilization" that involves the fusion of sperm with the two polar nuclei
all the sepals of a flower are collectively known as the
calyx
certain orchids produce flowers and secrete scents that resemble female bees so that male bees will mount these flowers and attempt to copulate with them. this bizarre occurrence is an example of
coevolution
corn and other grasses have a unique sheath of cells known as the _____ that surrounds and protects the young shoot
coleoptile
in the process of double fertilization, one sperm fuses with the egg and the other sperm fuses with a spore
false- the polar nuclei
a rhizome is a horizontal aboveground stem
false- underground
imbibition is the process by which a seed takes in oxygen from the environment
false- water
the union of gametes is called _______ and takes place within the _______ of a flower
fertilization, ovary
fruits that develop from a flower with many separate ovaries are referred to as
aggregate fruits
sometimes plants produce embryos in seeds without meiosis and fusion of gametes. this process is known as
apomixis
the male gametophyte is also called an embryo sac
false- female
when a microsporocyte divides, its daughter cells are diploid
false- haploid
in double fertilization, one sperm fuses with the egg, and other sperm fuses with the two antipodal nuclei
false- polar
an ovule usually develops directed into a fruit
false- seed
the petals constitute the outermost whorl of flower parts
false- sepals
the integuments develop into the seed coat
true
a ______ is an underground stem that is greatly enlarged for food storage
tuber
bat-pollinated, night-blooming flowers would most likely display which two characteristics
white petals and a strongly sweet scent