Deck 22: The Algae

Question 1

All of the following are genera being studied for the purpose of biofuel production except one.Choose the exception.

A)Ulva
B)Chlamydomonas
C)Chlorella
D)Anabaena
E)Dunaliella

Answer 1

A

Question 2

The red color of red algae is due to the pigment

A)phycoerythrin.
B)chlorophyll c.
C)fucoxanthin.
D)carotene.
E)xanthophyll.

Answer 2

A

Question 3

You discover a single-celled organism living in a freshwater pond.It is covered in cellulose plates and has two flagella.You have discovered a

A)dinoflagellate.
B)euglena.
C)cyanobacterium.
D)diatom.
E)green alga.

Answer 3

A

Question 4

In the life cycle of a green alga,syngamy occurs between

A)zoospores.
B)sporangia.
C)gametes.
D)zygotes.
E)gametophytes.

Question 5

This organism first appeared in the fossil record 3.5 billion years ago and has phycobillin accessory pigments.This organism is a

A)dinoflagellate.
B)euglena.
C)cyanobacterium.
D)diatom.
E)green alga.

Question 6

All of the following correctly pair up an organism with a unique structure or compound is possesses except one.Choose the exception.

A)cyanobacteria - heterocysts
B)diatoms - frustule
C)red algae - phycobillins
D)brown algae - alginic acid
E)green algae - conceptacles

Question 7

What is found in land plants that is lacking in Fucus?

A)the pigment,chlorophyll
B)multicellularity
C)cellular nuclei
D)a true alternation of generations
E)more than one of these

Question 8

In the life cycle of a green alga,meiosis specifically occurs in the

A)gametophyte.
B)sporangia.
C)gametangia.
D)sporophyte.
E)zygotE.

Question 9

In which of the following way(s)does (do)algae differ from land plants?

A)Algae do not have cell walls.
B)Some algae do not have chlorophyll a.
C)Some algae are not photosynthetiC.
D)Algae are not embryophytes.
E)All of these are ways in which algae differ from land plants.

Question 10

A heterocyst is a cell specialized for

A)photosynthesis.
B)nitrogen fixation.
C)sexual reproduction.
D)cellular respiration.
E)external digestion.

Question 11

Which of the following is not a hydrocolloid?

A)agar
B)alginic acid
C)carrageenan
D)cellulose
E)more than one of these is not a hydrocolloid

Question 12

You discover a flagellated single-celled organism living in a freshwater pond.It has a greenish color,a pellicle,and a large red eye spot.You have discovered a

A)dinoflagellate.
B)euglena.
C)cyanobacterium.
D)diatom.
E)green alga.

Question 13

Based on genetic studies,the living genus of algae that most closely resembles the evolutionary ancestor of land plants is

A)Chlamydomonas
B)Coleochaete
C)Microcladia
D)Fucus
E)Laminaria

Question 14

From which of the following did land plants evolve?

A)Rhodophytes
B)Dinophytes
C)Chlorophytes
D)Phaeophytes
E)Euglenophytes

Question 15

When does sexual reproduction occur is diatoms?

A)when ocean temperatures fall below 4C
B)after zoospores hibernate for several months
C)after one of the frustule halves reaches a certain size
D)after a diatom passes through the gut of an anemone
E)trick question - all diatoms are a sex

Question 16

You discover a single-celled organism living in a tide pool encased within a glassy wall-like shell.It has a centric shape.You have discovered a

A)dinoflagellate.
B)euglena.
C)cyanobacterium.
D)diatom.
E)green alga.

Question 17

In the life cycle of brown algae,meiosis specifically occurs in

A)oogoniA.
B)antheridia.
C)the female thallus.
D)the male thallus.
E)more than one of thesE.

Question 18

Their high production of _______ make microalgae valuable for the production of biofuel.

A)monosaccharides.
B)triglycerides.
C)polysaccharides.
D)waxes.
E)proteins.

Question 19

Ulva is both

A)isogamous and heteromorphic.
B)anisogamous and heteromorphic.
C)anisogamous and isomorphiC.
D)isogamous and isomorphic.
E)oogamous and isomorphic.

Question 20

Which of the following substances has been shown to block the replication of rhinoviruses?

A)agar
B)alginic acid
C)carrageenan
D)cellulose
E)phycobillins

Question 21

How do toxins produced by Microcystis aeruginosa cause damage?

A)by interfering with protein synthesis
B)by breaking down the cytoskeleton
C)by disrupting mitosis
D)by poking holes in the nuclear membrane

Question 22

Ciguatera poisoning is due to activities of:

A)green algae
B)diatoms
C)dinoflagellates
D)brown algae
E)Euglena

Question 23

Which of the following is a common component of ice cream and toothpaste?

A)agar
B)alginic acid
C)carrageenan
D)cellulose
E)more than one of these is a common component of ice cream and toothpaste

Question 24

Instead of a rigid cell wall,a proteinaceous pellicle occurs on organisms in the Division:

A)Dinophyta
B)Euglenophyta
C)Chlorophyta
D)Bacillariophyta
E)Rhodophyta

Question 25

Which group of algae can be differentiated into a holdfast,stipe,and blade?

A)cyanobacteria
B)brown algae
C)dinoflagellates
D)green algae
E)red algae

Question 26

The unicellular algae that cause "red tides" belong to the Division:

A)Rhodophyta
B)Bacillariophyta
C)Chlorophyta
D)Dinophyta
E)Phaeophyta

Question 27

One of the most toxic cyanobacteria is

A)Nostoc
B)Azolla
C)Anabaena
D)Oscillatoria
E)Gleobacter

Question 28

Algal blooms are triggered by:

A)rapid temperature change
B)increasing salinity
C)decreases in oxygen
D)nutrient enrichment
E)increases in carbon dioxide

Question 29

This dinoflagellate species is stimulated to producing toxins after consuming fish feces.The skin of fish affected by the toxin is destroyed and the affected fish die within hours after exposure to the toxin.This dinoflagellate species is

A)Codium fragile.
B)Karenia brevis.
C)Pfiesteria piscicida.
D)Grateloupia turuturu.

Question 30

The unicellular algae that cause "Red Tides" are known as _______.

Question 31

How is Caulerpa taxifolia and other siphonous algae different from typical green algae?

A)they do not use chlorophyll a and b as photosynthetic pigments
B)they do not have a thallus
C)they have both zoospores and gametes in its life cycle
D)they are heteromorphic and heterotrophic
E)they are coenocytic and have a stolon

Question 32

Compounds isolated from Amphidinium have shown promise as

A)biolfuels.
B)cancer fighting agents.
C)a treatment for AIDS.
D)a stabilizing agent in a variety of foods.
E)being useful in all of these applications.

Question 33

How do red algae differ from green and brown algae?

A)They contain no form of chlorophyll.
B)They have a multicellular thallus.
C)Their gametes are not flagellated.
D)Their environments are mainly marine.
E)All of these are ways in which red algae differ from green and brown algaE.

Question 34

Porphrya is also known as

A)kombu.
B)wakame.
C)dulse.
D)nori.
E)more than one of thesE.

Question 35

Which of the following is a neurotoxin produced by members of the Cyanobacteria?

A)hepatotoxin
B)ciguatoxin
C)mycotoxin
D)anatoxin-a
E)digitalin

Question 36

Which of the following high-protein "alga" was cultivated by the Aztecs and is a traditional food in Chad?

A)Spirulina
B)Nostoc
C)Chlamydomonas
D)Undaria
E)Laminaria

Question 37

Which of the following is not a contributing factor to the success of Caulerpa taxifolia?

A)tolerance of broad range of temperatures
B)an elaborate sexual reproduction strategy
C)rapid growth rate
D)its inedibility
E)all of these are contributing factors to the success of Caulerpa taxifolia

Question 38

What organ is affected by the toxins produced by Microcystis aeruginosa?

A)liver
B)stomach
C)pancreas
D)heart
E)small intestine

Question 39

Brevetoxins cause _______ in humans.

A)diarrhea
B)paralysis
C)nerve damage
D)respiratory illness
E)all of these ailments

Question 40

In Fucus,the swollen areas at the ends of the blade are reproductive regions known as ________.

Question 41

Agar and carrageenan are examples of chemicals called ______ which are used as emulsifiers,stabilizers,and gelling agents.

Question 42

______ have virtually indestructible shells of glass which have been used industrially for their polishing,filtering,and reflective properties.

Question 43

Invasive species usually have low reproductive rates.

Question 44

The body of an alga is termed the ________.

Question 45

Siphonous algae have a tubular organization with no internal walls.

Question 46

Chlorophyll a and b occur in all divisions of algae but not the Cyanobacteria.

Question 47

The glass-like cell wall of diatoms is called a frustule.

Question 48

The dinoflagellates appeared on earth 3.5 billion years ago.

Question 49

In biological control,a synthetic toxin is introduced to control the spread of an invasive species.

Question 50

______ can be used as soil additive since it can act like a field of broken glass to discourage some microscopic garden pests.

Question 51

Agar is derived from ______ and is used as a growth medium for microorganisms.

Question 52

Dinoflagellates cause ciguatera poisoning,a type of food poisoning with bizarre neurological symptoms.

Question 53

______ is a product derived from the brown algae that imparts a smooth texture in both foods like icings and puddings and in industrial products like paints and hand lotions.

Question 54

Diatoms with bilateral symmetry are known as _______ diatoms.

Question 55

The genus Pfiesteria in the Division Chlorophyta is capable of forming toxic metabolites.

Question 56

Spirulina,now a dietary protein supplement,was first grown in shallow ponds by the Aztecs.

Question 57

The euglenoids are capable of producing an extremely powerful nerve toxin and are responsible for the phenomenon known as the Red Tide.

Question 58

Dinoflagellates only occur in marine environments.