Bio Unit 3/lecture 23

Front 1

When pollen from one species lands on the stigma of a flower from another species

Back 1

the pollen tube typically does not develop

Front 2

Unlike in animal meiosis, meiosis in plants gives rise to

Back 2

haploid spores

Front 3

the micropyle is

Back 3

a small opening at one end of an ovule

Front 4

In a flower, an anther is typically at the tip of a(n)

Back 4

filament

Front 5

Meiosis in flowering plants gives rise to cells that are

Back 5

haploid gametophytes

Front 6

A plant species where each plant can only make either male or female flowers is called a ______ species and always has ______ flowers.

Back 6

dioecious; imperfect

Front 7

In the flower diagram shown, the item labeled "5" is the

Back 7

stigma

Front 8

Studies have shown that in the flowering plant Arabidopsis the development of parts of a flower is governed by

Back 8

the expression patterns of several floral organ homeotic genes

Front 9

The female gametophyte in flowering plants is the

Back 9

embryo sac

Front 10

In flowering plants an ovary is part of a(n)

Back 10

carpel

Front 11

A fruit that develops from several ovaries in a single flower, such as a raspberry, is called a(n)

Back 11

aggregate fruit

Front 12

The innermost whorl of a flower typically consists of one or more

Back 12

carpels

Front 13

Along with the egg, in the part of an embryo sac next to the micropyle you should find

Back 13

synergids

Front 14

A flower with petals, sepals, and one carpel but no stamens is

Back 14

imperfect and incomplete

Front 15

For a typical flowering plants, the first cell of the triploid (3n) endosperm is formed from

Back 15

one sperm fused with the central cell

Front 16

The embryonic root, which is where the pollen tube enters the ovule prior to fertilization, is called the

Back 16

radicle

Front 17

In seeds, the shift from active metabolism to dormancy, and then reactivation and germination is based on levels of

Back 17

abscisic acid

Front 18

In flowering plants how many egg cells are typically produced from each megaspore mother cell?

Back 18

1

Front 19

In flowering plants

Back 19

the gametophytes are smaller than the sporophytes and do not nourish themselves

Front 20

The female reproductive whorl of a flower typically consists of one or more

Back 20

carpels

Front 21

After fertilization in flowering plants, an embryo in a seed

Back 21

is always a sporophyte

Front 22

Once a pollen tube lands on a compatible stigma

Back 22

chemical cues guide the pollen tube from the stigma to the embryo sac of an ovule

Front 23

A flower must have one or more _____ to be able to make seeds

Back 23

carpels

Front 24

In the flower diagram shown, the item labeled "3" is a(n)

Back 24

filament

Front 25

In the flower diagram shown, the item labeled "4" is a(n)

Back 25

anther

Front 26

Which of the following is the most typical order of events in seed germination?

Back 26

water imbibition-seed coat splits-root cells divide and elongate-shoot cells divide and elongate

Front 27

In flowering plants how many sperm cells are typically produced from each microspore mother cell?

Back 27

8

Front 28

Which of the following occurs for the production of a pollen grain from a microspore mother cell?

Back 28

meiosis, then mitosis

Front 29

The process of asexual reproduction where a diploid embryo develops from an unfertilized egg or from diploid cells in ovule tissue is called

Back 29

apomixis

Front 30

Many fully differentiated plant cells are totipotent, meaning that they

Back 30

have the potential to form a whole, fully-functional plant