Chapter 18

Question 1

epiphyte

Answer 1

an algo or plant that attaches itself in a nonparasitic manner to another living organism

Question 2

lignin

Answer 2

adds mechanical strength to cell walls and provides protection against microbes

Question 3

green algae

Answer 3

occur in a rich variety of forms and in very diverse and widespread habitats.

Question 4

plankton

Answer 4

free floating, mostly microscopic organisms

Question 5

Chlamydomonas

Answer 5

small, actively moving alga found in freshwater pools. unicellular with a slightly oval cell surrounded by a complex multilayered wall that is partially composed of glycoproteins

Question 6

pyrenoids

Answer 6

proteinaceous structures associated with the synthesis of starch

Question 7

haploid cells

Answer 7

carry only one copy of each chromosome

Question 8

ulothrix meaning in greek

Answer 8

ulo: wooly Thrix: hair

Question 9

holdfast

Answer 9

an attachment cell, cells of attachment. NOT A ROOT

Question 10

isogamy

Answer 10

gametes of same size and appearance

Question 11

spirogyra

Answer 11

has watery sheaths that make the algae feel slimy.

Question 12

conjugation tubes

Answer 12

tubes that form between cells that aid in information exchanging

Question 13

the type of sexual reproduction seen in spirogyra is ___________

Answer 13

conjugation

Question 14

oedegonium

Answer 14

filamentous green algae often found attached to aquatic plants and algae.

Question 15

oogamy

Answer 15

one gamete is motile while the other is larger and stationary

Question 16

water nets

Answer 16

form net like tubular colonies

Question 17

classes of algae (4)

Answer 17

Yellow Green Algae
Golden Brown Algae
Diatoms
Brown Algae

Question 18

statospore

Answer 18

a unique resting spore that uncork and release protoplast inside

Question 19

Diatoms

Answer 19

mostly unicellular algae occurring in astronomical numbers in both fresh and saltwater

Question 20

thallus (plural thalli:)

Answer 20

multicellular bodies that are usually flattened and not organized into leaves, stems or roots. they are differentiated into holdfast, stipe or blades.

Question 21

holdfast

Answer 21

tough sinewy structure resembling a mass of intertwined roots. ARE NOT ROOTS

Question 22

Stalk of the stipe

Answer 22

often hollow with a meristem either at its base or at the blade junction.

Question 23

blades

Answer 23

photosynthetic. contain bladders used for floating the algae.

Question 24

algin, or alginic acid

Answer 24

occurs on or in the cell walls and can represent as much as 40% of the dry weight in kelps.

Question 25

conceptacles

Answer 25

spherical hollow chamber

Question 26

gametangia

Answer 26

located in conceptacles, structures where gametes are produced.

Question 27

oogonium

Answer 27

female gamete

Question 28

antheridium

Answer 28

male gamete

Question 29

female sex structures in red algae are called

Answer 29

carpogonia

Question 30

phycobilins

Answer 30

red and blue accessory pigments

Question 31

eyespot

Answer 31

associated with light detection

Question 32

dinoflagellates

Answer 32

have two flagella, one acts as a propeller and the other wraps around the dinoflagellate and makes it spin

Question 33

haptonema

Answer 33

a false flagella with a sticky tip that helps capture food

Question 34

haptophytes

Answer 34

unicellular with two smooth flagella of similar length inserted at the apex.

Question 35

diatomaceous earth

Answer 35

fine dust that contains diatoms

Question 36

algin

Answer 36

gelatinous material formed by brown kelps

Question 37

agar

Answer 37

culture media produced by algae

Question 38

slime mold

Answer 38

without chlorophyll and are unable of producing their own food.

Question 39

sporangia

Answer 39

contain spores

Question 40

water molds

Answer 40

water diseases, “Ich” in fish, potato blight