Biol 112 Chapter 30

Front 1

What does a seed consist of?

Back 1

an embryo, its food supply, surrounded by a protective coat

Front 2

When a plant produces only one type of spore and gives rise to a bisexual gametophyte, the plant is said to be _______.

Back 2

homosporous

Front 3

When a plant produces 2 kinds of spores, megaspores and microspores, it is said to be _________.

Back 3

heterosporous

Front 4

What are the two types of spores that heterosporous plants produce?

Back 4

megaspores and microspores

Front 5

What produces microspores?

Back 5

microsporangia

Front 6

What produces megaspores?

Back 6

megasporangia

Front 7

How many functional megaspores do each megasporangium have?

Back 7

One

Front 8

What is the layer of sporophyte tissue called that envelopes and protects the megasporangium?

Back 8

integument

Front 9

How many integuments do gymnosperm have?

Back 9

One

Front 10

How many integuments do angiosperms have?

Back 10

Two

Front 11

Which type of seed plant has two integuments?

Back 11

Angiosperms

Front 12

Which type of seed plant has one integument?

Back 12

Gymnosperms

Front 13

What is the structure that is comprised of a megasporangium, megaspore, and integument called?

Back 13

Ovule

Front 14

What does a microspore develop into?

Back 14

Pollen grain

Front 15

What is a male gametophyte enclosed in a pollen wall?

Back 15

Pollen grain

Front 16

What is a pollen grain?

Back 16

male gametophyte enclosed in a pollen wall

Front 17

Why is the male gametophyte said to be in the pollen grain and not equivalent to it?

Back 17

The outer layer of the pollen wall is composed of molecules secreted by sporophyte cells

Front 18

What polymer does the pollen wall contain?

Back 18

Sporopolenin

Front 19

What is the function of the pollen wall?

Back 19

Protects pollen grain

Front 20

The function of the ________ is to protect the pollen grain

Back 20

Pollen wall

Front 21

What is pollination?

Back 21

transfer of pollen to the part of the seed plant which contains ovules.

Front 22

Name this process: the transfer of pollen to the part of the seed plant which contains ovules.

Back 22

Pollination.

Front 23

What happens when a pollen grain reaches an ovule and germinates?

Back 23

gives rise to pollen tube that discharges sperm into female gametophyte within ovule

Front 24

What is a micropyle?

Back 24

A small pore in an ovule that the pollen enters during pollination; how the pollen gets access to the ovule

Front 25

What is the small pore in ovules called that pollen enters during pollination?

Back 25

micropyle

Front 26

If a sperm fertilizes an egg of a seed plant, what does the zygote grow into?

Back 26

Sporophyte embryo

Front 27

_____ can remain dormant for years while _____ have shorter lives.

Back 27

seeds; spores

Front 28

What is the coat of the seed derived from?

Back 28

The integument of the ovule

Front 29

What is the spore wall of the seed derived from?

Back 29

megasporangium that dries out after fertilization

Front 30

Where are ovules found in conifers?

Back 30

Ovulate cone

Front 31

Where are ovules found in angiosperm?

Back 31

Ovary

Front 32

How many ovules does an ovulate cone have?

Back 32

Two

Front 33

Where does a pollen grain develop in angiosperms?

Back 33

Anther

Front 34

Where does a pollen grain develop in conifers?

Back 34

pollen cone

Front 35

Name this process: the discharging of sperm through a pollen tube to reach an egg, initiating the transformation of the ovule into a seed

Back 35

Fertilization