Protozoa

Question 1

Kingdom:

Answer 1

Protista

Question 2

Nutritional type:

Answer 2

Chemoheterotroph

Question 3

Multicellularity:

Answer 3

None

Question 4

Cellular arrangement:

Answer 4

Unicellular

Question 5

Food acquisition method:

Answer 5

Absorptive; ingestive (cytostome)

Question 6

Characteristic features:

Answer 6

Motility; some form cysts

Question 7

Characteristic features:

Answer 7

None

Question 8

a complete organism in which all life activities occur within the limits of a single cell membrane.

Answer 8

protozoan

Question 9

“first animals,” meant to describe animal-like nutrition.

Answer 9

protozoa

Question 10

The feeding and growing stage feeds upon bacteria and small particulate nutrients. Some protozoa are part of the normal microbiota of animals.

Answer 10

trophozoite

Question 11

Free-living, mutualism, commensalism, parasitism all represented in the group (true or false)

Answer 11

true

Question 12

Locomotion by pseudopodia, flagella, cilia, and direct cell movements; some sessile (true or false)

Answer 12

true

Question 13

is in which the organelles are duplicated and the protozoan then divides into two complete organisms.

Answer 13

Fission

Question 14

Asexual reproduction beginning as a protuberance from the parent cell that grows to become a daughter cell.

Answer 14

Budding.

Question 15

is multiple fission; the nucleus undergoes multiple divisions before the cell divides. After many nuclei are formed, a small portion of cytoplasm concentrates around each nucleus, and then the single cell separates into daughter cells.

Answer 15

Schizogony

Question 16

During protozoan conjugation, two cells fuse, and a haploid nucleus (the
micronucleus) from each cell migrates to the other cell. This haploid micronucleus fuses with the haploid micronucleus within the cell. The parent cells separate, each now a fertilized cell. When the cells later divide, they produce daughter cells with recombined DNA.

Answer 16

Conjugation.

Question 17

Some protozoa produce gametes (gametocytes), which are haploid sex cells. During reproduction, two gametes fuse to form a diploid zygote.

Answer 17

Syngamy.

Question 18

Under certain adverse conditions, some protozoa produce a protective capsule called a

Answer 18

cyst

Question 19

permits the organism to survive when food, moisture, or oxygen are lacking, when temperatures are not suitable, or when toxic chemicals are present.

Answer 19

cyst

Question 20

The cyst formed by members of the phylum Apicomplexa is called an

Answer 20

oocyst.

Question 21

Mostly aerobic heterotrophs; many intestinal protozoa are capable of

Answer 21

anaerobic growth.

Question 22

Two chlorophyll-containing groups are often studied with algae.

Answer 22

dinoflagellates and euglenoids,

Question 23

However, some have a protective covering thus require specialized structures to take in food.

Answer 23

pellicle,

Question 24

Ciliates take in food by waving their cilia toward a mouthlike opening called a

Answer 24

cytostome.

Question 25

In all protozoa, digestion takes place in membrane-enclosed vacuoles, and waste may be eliminated through the plasma membrane or through a specialized

Answer 25

anal pore.

Question 26

Euglenoids have a semirigid plasma membrane called a

Answer 26

pellicle,

Question 27

Most euglenoids also have a

Answer 27

red eyespot

Question 28

Some euglenoids are facultative

Answer 28

chemoheterotrophs.

Question 29

The amebae move by extending blunt, lobe like projections of the cytoplasm called

Answer 29

pseudopods.

Question 30

not motile in their mature forms and are obligate intracellular parasites.

Answer 30

APICOMPLEXA

Question 31

Ciliates have _____ that are arranged in precise rows on the cell.

Answer 31

cilia

Question 32

is covered with rows of cilia.

Answer 32

Paramecium