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Memoria Press Modern Biolgoy > Chapters 33 & 34 > Flashcards

Chapters 33 & 34 Flashcards

1
Q

The common jellyfish moves form the blastula state to a ciliated larva called a ___.

A

planula

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2
Q

The genus Aurelia belongs to which class of cnidarians?

A

scyphozoa

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3
Q

Name some of the characteristics of Porifera.

A

hermaphroiditic, multicellular, sessile

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4
Q

Respiration in Porifera occurs through ___.

A

simple diffusion

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5
Q

The jellylike substance between the two cell layers that make up the body of a Porifera is ___.

A

mesohyl

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6
Q

Pores in teh body of the sponge wall where water enters the organism are the ___.

A

ostia

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7
Q

Songin is ___.

A

protein fibers that make up the skelton of some sponges

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8
Q

Bell-shaped cnidarians specialized for swimming occur in this form.

A

medusa

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9
Q

cells that crawl around the body of a sponge and pick up and deliver nutrients are ___.

A

amoebocytes

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10
Q

The inner cell layer of cnidarian is the ___.

A

gastrodermis

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11
Q

The long coiled filament organelle specialized for paralyzing and capturing prey is ___.

A

nematocyst

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12
Q

The characteristic that allows cells of a sponge to regroup into a new or same sponge is ___.

A

recognition

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13
Q

This organ coordinates all of the body activities of a cnidarian.

A

nerve net

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14
Q

A freshwater hydra reproduces ___ during warm summer months.

A

asexually

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15
Q

Species Obelia and Physalia belong to which class of cnidarians?

A

hydrozoa

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16
Q

The sea anemone and coral belong to which class of cnidarians?

A

anthozoa

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17
Q

The sensory structure found in most ctenophores that allows the animal to sense its position in the water as well as coordinate its movements is the ___.

A

apical organ

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18
Q

The digestive system of cnidarians as well as their form of indirect development classify them as ___.

A

protostomes

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19
Q

flatworms have no need for circulatory or respiratory systems because ___.

A

the flattened body shape allows for diffusion of gasses into cells

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20
Q

Name some facts about tapeworms.

A

They can infect a person who eats undercooked beef. They can grow very large in human intestines. They do not have a digestive system.

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21
Q

What uses a snail as an intermediate host?

A

schistosoma

22
Q

Describe the eggs of ascaris.

A

They are carried by human waste. They can survive in the soil for years. Develop into larvae in the intestine.

23
Q

Name three types of roundworm that live a parasitic life.

A

ascaris, enterobius, trichinella

24
Q

The thick protective covering on endoparasitic flukes that prevents them from being digested by their host is the ___.

A

tegument

25
Q

Name some structures that help planarians deal with water entering their bodies by osmosis.

A

flame cells, excretory tubules, and cilia

26
Q

Taenia saginatus is a tapeworm from the class

A

cestoda

27
Q

The knob-shaped organ with hooks and suckers on a tapeworm is called the ___.

A

scolex

28
Q

The primary hosts of Taenia saginatus are ___.

A

humans

29
Q

Nematodes are ___.

A

pseudocoelomates

30
Q

Cnidarians are ___.

A

coelenterates

31
Q

Most trematodes enter their human host by ___.

A

boring through the skin and into the blood vessels

32
Q

Each mature tapeworm prolgottid ___.

A

contains both male and female reproductive organs; contains fertilized eggs that develop into larvae; is eliminated in feces

33
Q

The roundworm that feeds on blood from the intestinal wall of cats, dogs, and humans is the ___.

A

hookworm

34
Q

The intestinal parasite causing trichinosis is ___.

A

trichinella

35
Q

The most common parasitic worm infection in the U.S. is ___.

A

Enterobius

36
Q

The parasitic nematode that uses a mosquito as its vector is the ___.

A

Filaria

37
Q

Name some characteristics of rotifers.

A

They are 100-500 µm in size. They are free living and nonparasitic. They are multicellular with complex organ systems.

38
Q

The parasitic nematode affecting the lymphatic system and causing elephantiasis is ___.

A

filaria

39
Q

Name some characteristics of a ctenophore.

A

colloblasts, apical organ, bioluminescence

40
Q

parthenogenesis

A

rotifera

41
Q

amoebocytes

A

porifera

42
Q

flame cells

A

platyhelminthes or rotifera

43
Q

proglottids

A

platyhelminthes

44
Q

cnidocytes

A

cnidaria

45
Q

schistosoma

A

platyhelminthes

46
Q

nerve net

A

cnidaria

47
Q

choanocytes

A

porifera

48
Q

medusa

A

cnidaria

49
Q

mastax

A

rotifera

50
Q

acoelomates

A

platyhelminthes

Memoria Press Modern Biolgoy (29 decks)

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