chapter 26 section 2

Question 1

large, contains multiple copies of DNA, responsible for metabolic functions

Answer 1

macronucleus

Question 2

small, participates in the exchange of genetic information during conjugation

Answer 2

micronucleus

Question 3

amoebas move by means of a process known as

Answer 3

cytoplasmic streaming

Question 4

which of the following is not formed from the tests of dead sarcodines

Answer 4

granite

Question 5

sexual reproduction in ciliates involves

Answer 5

the exchange of haploid micronuclei between two individuals

Question 6

one disease cause by a zooflagellate is

Answer 6

trypanosomiasis

Question 7

most species in the phylum sporozoa are

Answer 7

parasitic and have complex life cycles

Question 8

how have foraminifera and radiolarians contributed to the formation of sedimentary layers on the ocean floor

Answer 8

the hard tests that cover the bodies of these organisms sink to the bottom of the ocean, where they pile up as layers of sediment

Question 9

describe the process of feeding and digestion in a paramecium

Answer 9

cilia lining the oral groove sweep food down the groove to the mouth pore, which opens into the gullet. Food passes from the gullet to food vacuoles, where digestion takes place. Undigested food is expelled by the anal pore.

Question 10

name two human diseases caused by protozoans in the phylum zoomastigina, and briefly describe the symptoms of each disease

Answer 10

trypanosomiasis-fever, lethargy, mental deterioration, coma

chagas’ disease- fever, heart damage

Question 11

although the protozoans that cause malaria are non motile, they parasitize two hosts during their life cycle. how do they accomplish this?

Answer 11

they use the circulatory system of their human and mosquito hosts to transport them through their hosts’ bodies, and they depend on mosquitoes to transport them to other human hosts