chapter 37 biology

endosperm tissue is

3n

sexual reproduction results in:

genetic diversity among offspring

bat-pollinated, night-blooming flowers would most likely display which two characteristics?

white petals and a strongly sweet scent

plants that produce scentless, inconspicuous flowers with enormous amounts of pollen are adapted to which type of pollination?

wind

the absorption of water by a dry seed is known as:

imbibition

Flowers that are strongly odiferous and blue or UV purple in color would most likely be pollinated by:

insects

Most flowers are pollinated by which method?

insects

which statement about the megasporocyte is true?

it is a diploid cell located within an ovule

which of the following is an example of modified underground bud with fleshy leaves for storage?

onion

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 _____ and the ovary develops into _____

seed; fruit

the order of whorls from the flowers periphery to the center is:

sepals, petals, stamen, 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

all the sepals of a flower are collectively known as the:

calyx

what is an example of a seed dispersed by water?

coconut

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 know as the ____ that surrounds and protects the young shoot

coleoptile

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

as a seed develops from an ovule, the ovule wall enlarges and develop into a

fruit

`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

special structures found in seeds that are dispersed by ants are called:

elaiosomes

in most developing dicot seeds, the primary source of nurtitive 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

the male gametophyte is also called an embryo sac

false- famale

when a microsporocyte divides, its daugther cells are diploid

false- haploid

In double fertilization, one sperm fuses with the egg, and the other sperm fuses with the two antipodal nuclei.

false- polar

an ovule usually develops directly into a fruit

false- seed

The petals constitute the outermost whorl of flower parts.

false- sepals

a ____ is an underground stem that is greatly enlarged for food storage

tuber