Lesson 17 Terms

Question 1

Abscisic acid

Answer 1

promotes seed dormancy and causes buds to produce scales

Question 2

Anther

Answer 2

contains the male gamete; produces pollen

Question 3

Auxins

Answer 3

promote stem elongation and repress lateral bud growth

Question 4

Chemotropism

Answer 4

plant response to chemicals

Question 5

Complete flowers

Answer 5

have both male and female parts

Question 6

Cross-pollination

Answer 6

occurs when pollen is transferred from one plant to another, creating greater diversity

Question 7

Cytokinin

Answer 7

promote lateral bud growth

Question 8

Double fertilization

Answer 8

A fertilization process that requires two sperm to fuse with two other cells

Question 9

Endosperm

Answer 9

provides food for the embryonic plant

Question 10

Ethylene

Answer 10

stimulates fruit ripening

Question 11

Filament

Answer 11

long thread-like stalk

Question 12

Geotropism

Answer 12

plant response to gravity

Question 13

Germination

Answer 13

the sprouting of a seed

Question 14

Gibberellins

Answer 14

regulate normal plant growth

Question 15

Hormones

Answer 15

chemicals produced and then transported to another part of an organism to cause a response

Question 16

Incomplete flowers

Answer 16

have male or female parts, not both

Question 17

Micropyle

Answer 17

the opening to the ovule in a flowering plant

Question 18

Minerals

Answer 18

an essential element for plant growth

Question 19

Ovary

Answer 19

the base of the pistil which contains ovules, the female gametes

Question 20

Pedicel

Answer 20

the stalk that supports the flower below the receptacle

Question 21

Petals

Answer 21

arranged in a ring above the sepals

Question 22

Photoperiodism

Answer 22

plants response to the length of darkness

Question 23

Phototropism

Answer 23

plant response to light

Question 24

Pistil

Answer 24

female portion of the flower, the innermost part

Question 25

Pistillate flower

Answer 25

have a pistil, but lack a stamen

Question 26

Pollen

Answer 26

the tiny granules that contain the male gametophyte of seed plants

Question 27

Pollination

Answer 27

transfer of pollen from anther to stigma

Question 28

Pollen tube

Answer 28

A tube that forms after germination of the pollen grain and that functions in the delivery of sperm to the ovule

Question 29

Receptacle

Answer 29

thickened part of the stem from where the flower grows

Question 30

Self-Pollination

Answer 30

occurs when the pollen is transferred from the anther to the stigma of the same plant

Question 31

Sepals

Answer 31

a) arranged above the pedicle in a ring

b) their function is to protect the flower as it matures

Question 32

Stamen

Answer 32

male portion of the flower, arranged in a ring inside the petals

Question 33

Staminate flower

Answer 33

have a stamen, but lack a pistil

Question 34

Stigma

Answer 34

the uppermost portion of the pistil; when mature, it’s sticky in order to catch pollen grains

Question 35

Style

Answer 35

the stalk-like extension that supports the stigma

Question 36

Thigmotropism

Answer 36

plant response to touch

Question 37

Triploid nucleus

Answer 37

has 3 copies of the plant’s chromosomes; forms the endosperm

Question 38

Tropism

Answer 38

occur when plants respond to their environment

Question 39

Vegetative reproduction

Answer 39

Type of reproduction in which new plants grow from vegetative parts such as roots, stems, and leaves; can happen spontaneously or induced by a grower