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MARI202 > Lab 1: Porifera, Cnidaria, and Ctenophora > Flashcards

Lab 1: Porifera, Cnidaria, and Ctenophora Flashcards

1
Q

In Latin, Porifera means?

A

To bear or have pores

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2
Q

Place these sponge forms in the correct order from simplest to most complex? Syconoid, Asconoid, Leuconoid

A

Asconoid, Syconoid, Leuconoid

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3
Q

Of the four classes of sponges recognised, most species belong to which class? Calcarea, Hexactinellida, Demospongiae, Homoschieromorpha

A

Demospongiae

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4
Q

Feeding in sponges is best described as?

A

Filter feeding

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5
Q

Sponge cells are totipotent, meaning that they are able to?

A

Can differentiate into many cell forms

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6
Q

True or False Choanocyte cell are characteristic of sponges

A

True

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7
Q

Describe features of sponge reproduction?

A

Hermaphordites all capable of reproducing sexually

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8
Q

Which best described the flow of water through a sponge?

A

Ostia to Choanocyte chamber to Apopyle to Atrium to Osculum

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9
Q

True or false: all sponges are marine

A

False

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10
Q

True or false: All sponges have colloblast cells

A

False

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11
Q

True or false: all sponges are filter feeders

A

False

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12
Q

True or false: all sponges are eumetazoans

A

False

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13
Q

What is the skeleton of a sponge is typically made of?

A

Collagen fibers and spicules

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14
Q

A sponge larval stage is called what?

A

Parenchymella larva

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15
Q

Sponge body symmetry is best described as?

A

Asymmetric

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16
Q

In Latin, what does cnidaria means?

A

An animal of stinging parts

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17
Q

An Ephyra is best described as?

A

Immature medusae formed through the process of strobilation

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18
Q

What is the largest Cnidarian class in terms of numbers of described species?

A

Anthozoa

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19
Q

Cnidarian body symmetry is best described as

A

Radial

20
Q

True or False: All Cnidarians have a medusa and polyp phase

A

False

21
Q

Reef building corals belong to which class of Cnidaria

A

Anthozoa

22
Q

Some cnidarians have a hard skeleton. Are these exoskeletons or endoskeletons?

A

Exoskeleton

23
Q

Body support can be achieved in cnidarians by

A
  • Hydrostatic pressure in the gut cavity
  • Stiffened fibers within the body
  • Secretion of calcified structures
24
Q

The larval stage of a sea anemone is called a

A

planula larva

25
Q

Cnidarians can get their nutrition by means of

A
  • suspension feeding
  • predation
  • a symbiotic relationships with algae
26
Q

In Cnidarians the mesoglea is

A

A non-cellular layer between the gastrodermis and the epidermis

27
Q

True or False: Cnidarians are triploblasts

A

False

28
Q

The pneumatophore is

A

The gas filled float of some colonial coelenterates such as the Portuguese man-of-war

29
Q

True or False: Strobilation is a process of asexual reproduction

A

True

30
Q

Cnidarians have the ability to sense

A

light, movement, orientation

31
Q

True or False: All cnidarian nematocyst cells inject toxins into prey

A

False

32
Q

In Latin, Ctenophore means

A

To have or bear combs

33
Q

Ctenophores are diploblasts

A

True

34
Q

Ctenes or comb rows are best described as:

A

Rows of long, fused cilia used for locomotion in Ctenophores

35
Q

True or False: Ctenophores are mostly marine

A

False

36
Q

Colloblasts, unique to Ctenophores are:

A

sticky cells used for capturing prey

37
Q

True or False: Ctenophores have a gut that includes both a mouth and two anuses

A

True

38
Q

Ctenophore reproduction can involve a free living larval stage called a:

A

Cydippid larva

39
Q

True or False: Most Ctenophores are hermaphrodites

A

True

40
Q

Body support in Ctenophores is achieved by

A

Elastic gelatinous mesenchyme

41
Q

True or False: Ctenophores have a true body cavity

A

False

42
Q

Ctenophores have a cellular layer between the ectoderm and the mesoderm called

A

Mesenchyme

43
Q

Some Ctenophores have oral lobes that are used for

A

Capturing prey such as fish

44
Q

Statements of Ctenophore feeding

A
  • Many Ctenophores have tentacles covered in colloblasts that are used to capture prey
  • Tentillae are smaller filaments coming off tentacles
  • Some Ctenophores have short tentacles and capture food using body mucus
45
Q

True or False: Colloblasts capture prey by adhesion rather than toxins

A

True

46
Q

The nervous system of a Ctenophore is best described as

A

A nerve net

47
Q

The apical sense organ is used for detecting

A

Orientation

MARI202 (5 decks)

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