-InvertebrateZooLEC29 Flashcards

1
Q

what are Invertebrates?

A

95% of known animal species that lack a backbone

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2
Q

what is phylum Porifera?

A

the simplest animals, sponges that live in both fresh and salt water
• they are sessile
• have a porous body
• lack true tissues

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3
Q

how many sponge species are describe?

A

5,000

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4
Q

what are the sponges’ bodies structured with?

A
  • silica fibers called spicules

- means they also have calcium carbonate skeleton like us

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5
Q

most sponges are hermaphrodites. what does this mean?

A

each individual functions as both male and female and they can reproduce sexually or asexually.

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6
Q

how do sponges use Choanocyte & Amoebocytes to filter feed?

A
  • Choanocyte create currents by beating flagella, food particles are trapped in the mucus
  • Amoebocytes engulf, digest, and transport nutrients to other cells
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7
Q

what animals belong to the clade Eumetazoa?

A

all animales except sponges that has true tissues

-sponges has their own clade

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8
Q

what are Cnidarians? how many layers of tissue do they have?

A
  • jellys, earliest eumetazoans with wide range of sessile and floating forms
  • two, diploblastic
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9
Q

what is the gastrovascular cavity that cnidarians have?

A

a single opening acts as both mouth and anus

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10
Q

do cnidarians have tentacles?

A

yes

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11
Q

how many cnidarian species are describe? what type of symmetry do they all have?
ex. anemone

A
  • 10,000

- radial symmetry

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12
Q

what are the sessile and floating form of cnidarians called?

A

polyp & medusa

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13
Q

are all cnidarians are carnivores? proof?

A

yes, they are armed with tentacles and cnidocytes for capturing prey

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14
Q

T or F? Many jellies are bioluminescent.

The largest are more than 100m long

A

true

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15
Q

class Hydrozoans

A
  • have both polyp and medusa forms in life cycle, they are jelly not fish
  • portuguese man-of-war
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16
Q

class Scyphozoa

A
  • major form of life cycles is medusa

- common jellyfishes in aquariums

17
Q

class Cubozoa

A
  • metamorphoses from polyp to medusa

- deadly sea wasps. poison is more potent than cobra venom & has eyes to see with

18
Q

Class Anthozoa

A
  • major form is polyps

- corals and sea anemones