lecture chapter 29 flowering plants life cycles

Question 1

A flower is a reproductive structure of an angiosperm

Flowers are modified leaves that develop on a thickened region of the stem called a

Answer 1

a receptacle

Question 2

Corolla:
Calyx:

Answer 2

Corolla: inner whorl of petals
Calyx: outer whorl of sepals

Question 3

-

Answer 3

Male flower parts-
Stamens: consist of a filament and an anther at the tip

Anthers: contain pollen sacs in which male gametophytes are produced

Question 4

Female flower parts
CARPELS-

OVARY-

OVULE-

STIGMA-

Answer 4

Female flower parts
CARPELS- consist of an ovary, stigma, and often a style

OVARY- enlarged base of carpel in which one or more ovules form

OVULE- structure in which female gametophytes are produced

STIGMA- upper part of carpel; receives pollen; held up by STYLE***

Question 5

CARPELS-

Answer 5

CARPELS- consist of an ovary, stigma, and often a style

Question 6

OVARY-

Answer 6

OVARY- enlarged base of carpel in which one or more ovules form

Question 7

OVULE-

Answer 7

OVULE- structure in which female gametophytes are produced

Question 8

STIGMA-

Answer 8

STIGMA- upper part of carpel; receives pollen; held up by STYLE***

Question 9

The arrival of pollen on a receptive stigma

Answer 9

Pollination

Question 10

Pollination

Answer 10

Pollination-

The arrival of pollen on a receptive stigma

Question 11

PERFECT FLOWERS—

IMPERFECT FLOWERS—

Answer 11

PERFECT FLOWERS— have both stamens and carpels (both sexes on one flower);

IMPERFECT FLOWERS— produce either stamens or carpels and are known as either male or female flowers and can potentially self-pollinate.

Question 12

IMPERFECT FLOWERS—

Answer 12

produce either stamens or carpels and are known as either male or female flowers and can potentially self-pollinate.

Question 13

PERFECT FLOWERS—

Answer 13

PERFECT FLOWERS— have both stamens and carpels (both sexes on one flower);

Question 14

Pollination Syndromes -

Answer 14

Pollination Syndromes - suites of flower traits that have evolved in response to natural selection

Question 15

Sporophyte-

Answer 15

Sporophyte-

Diploid, spore-producing plant body

Question 16

Life cycle of flowering plants is dominated by the sporophyte T OR F

Answer 16

TRUE

Question 17

Life cycle of flowering plants is dominated by the gametophyte TOR F

Answer 17

FALSE

Question 18

Gametophyte-

Answer 18

Gametophyte-

Haploid, gamete-producing structure

Question 19

Megaspore-

Answer 19

Megaspore-

Haploid spore that gives rise to an egg-producing gametophyte

Question 20

Microspore-

Answer 20

Microspore-

Haploid spore that gives rise to a pollen grain

Question 21

Flowering plants undergo double fertilization—

1-4

Answer 21

• Pollen tube that reaches and penetrates female gametophyte releases two sperm cells
• One sperm cell fuses with the egg and forms diploid zygote
• Second sperm cell fuses with endosperm mother cell and forms a triploid nucleus
• This triploid nucleus gives rise to endosperm (nutritive tissue in seeds of flowering plants)

Question 22

Seed:

Answer 22

Seed: a mature ovule that consists of an embryo sporophyte, its food reserves, and a seed coat

Question 23

a mature ovule that consists of an embryo sporophyte, its food reserves, and a “seed” coat

Answer 23

Seed:

Question 24

Seeds form after double fertilization-
1-
2-

Answer 24

Seeds form after double fertilization-
The zygote develops into an embryo
The endosperm becomes enriched with nutrients