Deck 17: Protists: Advent of the Eukaryotes

Question 1

What was the original purpose of sexual reproduction?

A) To repair damaged DNA
B) To form more complex organisms
C) To become better adapted to a given environment
D) All of these are correct.

Answer 1

A

Question 2

________ possess red pigments called phycobilins that give them their characteristic color.

A) Green algae
B) Brown algae
C) Red algae
D) Diatoms

Answer 2

C

Question 3

Eukaryotes are first seen in the fossil record __________ years ago.

A) 200,000
B) 2 million
C) 10 million
D) 1.7 billion

Answer 3

D

Question 4

Downy mildews such as Phytophthora infestans belong to this group.

A) Ciliates
B) Cellular slime molds
C) Plasmodial slime molds
D) Water molds

Question 5

Which group is believed to be ancestral to the plants?

A) Green algae
B) Brown algae
C) Red algae
D) Diatoms

Question 6

Protists in this group have a pellicle,and a light-sensitive organ called the stigma.

A) Foraminifera
B) Dinoflagellates
C) Choanoflagellates
D) Euglenoids

Question 7

Protists that ingest visible particles of food are called:

A) phototrophs
B) phagotrophs
C) osmotrophs
D) saprozoic feeders

Question 8

The __________ are unusual creatures that stream along in an oozing mass of slime.

A) ciliates
B) cellular slime molds
C) plasmodial slime molds
D) water molds

Question 9

The marine protists with pore-studded shells called tests belong to this group.

A) Sarcodina
B) Chlorophyta
C) Rhodophyta
D) Foraminifera

Question 10

There are over 11,500 species of these protists that have ornate,glasslike shells.

A) Green algae
B) Brown algae
C) Red algae
D) Diatoms

Question 11

These creatures are nonmotile,spore-forming,unicellular parasites of animals.

A) Amoeba
B) Sporozoans
C) Ciliates
D) Water molds

Question 12

The bacteria that today are most similar to chloroplasts are:

A) thermoacidophiles
B) nonsulfur purple bacteria
C) methanogens
D) cyanobacteria

Question 13

The ancestor to the animals appears to have belonged to this group.

A) Foraminifera
B) Dinoflagellates
C) Choanoflagellates
D) Euglenoids

Question 14

Related to the amoebas,these usually unicellular creatures are able to aggregate under times of stress.

A) Ciliates
B) Cellular slime molds
C) Plasmodial slime molds
D) Water molds

Question 15

The euglenozoan known as Trypanosoma causes _________ in humans.

A) schistosomiasis
B) malaria
C) tuberculosis
D) sleeping sickness

Question 16

The malarial parasite,Plasmodium,belongs to this group.

A) Amoeba
B) Sporozoans
C) Plasmodial slime molds
D) Water molds

Question 17

These creatures are heterotrophs with restricted mobility,have cell walls made up of cellulose,and carry out normal mitosis.

A) Euglenoids
B) Sporozoans
C) Molds
D) Fungi

Question 18

The 8,000 species in this group have countless rows of cilia.

A) Ciliates
B) Cellular slime molds
C) Plasmodial slime molds
D) Water molds

Question 19

Unicellular,photosynthetic protists with two flagella of unequal length belong to this group.

A) Foraminifera
B) Dinoflagellates
C) Choanoflagellates
D) Euglenoids

Question 20

The vector that transfers the malarial parasite to humans is the:

A) mosquito
B) fly
C) meat
D) amoeba

Question 21

Which type of life cycle do bacteria have?

A) Asexual
B) Zygotic meiosis
C) Gametic meiosis
D) Sporic meiosis
E) Budding

Question 22

The majority of protists reproduce ________ most of the time.

A) sexually
B) asexually
C) by parthenogenesis
D) by self-fertilization
E) by making eggs

Question 23

Amoebas move by:

A) cilia
B) flagella
C) pseudopods
D) gliding mechanisms
E) All of these

Question 24

Which organism is the most photosynthetically productive living organism that forms underwater forests over 100 meters long?

A) Golden algae
B) Brown algae
C) Green algae
D) Red algae
E) Diatoms

Question 25

Although __________________ evolved many times in different lines of the protists,most protists are single-celled.

Question 26

Which of the following reproduce by parthenogenesis?

A) Some lizards
B) Bees
C) Some frogs
D) Some fish
E) All of these

Question 27

Which of these kingdoms is the most diverse?

A) Protists
B) Fungi
C) Animal
D) Plant

Question 28

Protists move by:

A) cilia
B) flagella
C) pseudopods
D) gliding mechanisms
E) all of these.

Question 29

The most diverse kingdom is made up of the ______________.

Question 30

Protists typically only reproduce sexually during ________.

A) warm conditions
B) cold conditions
C) low pH conditions
D) stress
E) darkness

Question 31

The development of an adult from an unfertilized egg is called:

A) parthenogenesis
B) zygotic meiosis
C) gametic meiosis
D) sporic meiosis
E) budding

Question 32

Giant kelp is a type of __________ algae.

Question 33

Which organism produces the toxic red tide?

A) Foraminifera
B) Dinoflagellates
C) Zoomastigotes
D) Euglenoids
E) Diatoms

Question 34

Which type of life cycle do animals have?

A) Asexual
B) Zygotic meiosis
C) Gametic meiosis
D) Sporic meiosis
E) Budding

Question 35

_____________ is a common name for green photosynthetic protists.

Question 36

The development of an adult from an unfertilized egg is a form of asexual reproduction known as _______________.

Question 37

What is schizogony?

A) When organisms reproduce by budding
B) When aggregates of cells form
C) When fission is preceded by several nuclear divisions
D) When meiosis produces a variety of gamete types
E) When cysts are formed during times of stress

Question 38

Which organisms can do photosynthesis when there is light and become heterotrophs in the dark?

A) Dinoflagellates
B) Foraminifera
C) Zoomastigotes
D) Euglenoids
E) Diatoms

Question 39

There are _______ major phyla in the Kingdom Protista.

Question 40

When individual cellular slime mold amoebas are near starvation,all the individuals in that immediate area aggregate into a large moving mass of cells called a:

A) community
B) spore
C) slug
D) test
E) colony

Question 41

A(n)__________ is a transient collection of individuals that come together for a time.

Question 42

__________ meiosis occurs after fertilization.

Question 43

Why are colonial protists not considered to be multicellular?

Question 44

What is the evolutionary advantage of sexual reproduction?

Question 45

When conditions are inhospitable,some protists respond by forming ________.

Question 46

The most common type of asexual reproduction seen in the protists is _________.

Question 47

Plants arose from green algae.Why are green algae and plants not classified under the same kingdom?

Question 48

Why do biologists believe that red algae may be one of the most ancient groups of eukaryotes?

Question 49

What is the theory of endosymbiosis?