Fossil Practical II - The Sponges

15 Questions | By ProfMyrtle | Last updated: Mar 21, 2022 | Total Attempts: 75

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Fossil Practical II - The Sponges - Quiz

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1.

What is the life habit of sponges?
- A.
  
  Sessile benthic
- B.
  
  Demersal
- C.
  
  Vagrant benthic
- D.
  
  Epifaunal
2.

The geologic range of sponges is Cambrian to Recent.
- A.
  
  True
- B.
  
  False
3.

The fossil record shows the beginnings of multi-celled organisms during what period?
- A.
  
  Triassic
- B.
  
  Cambrian
- C.
  
  Hadean
- D.
  
  Ediacaran
4.

Multi-celled organisms, likely with loose associations with single-celled Protists that form simple colonies for survival.
- A.
  
  Protozoans
- B.
  
  Metazoans
- C.
  
  Eukaryotic
- D.
  
  Prokaryotic
5.

The inside of the sponge is called the _____ and is lined with a special ciliated, collared cells called _______.
- A.
  
  Spongocoel and choanocytes
- B.
  
  Choanocytes and spongocoel
- C.
  
  Porocytes and ostia
- D.
  
  Flagella and osculum
6.

The flagella of the choanocytes causes a current that draws in water and food from the osculum and out the porocytes.
- A.
  
  True
- B.
  
  False
7.

Food particles caught on the choanocytes’ collars are dispersed to other cells by amoebocytes that move around freely in the sponge.
- A.
  
  True
- B.
  
  False
8.

Some sponges do not have spicules.
- A.
  
  True
- B.
  
  False
9.

The outer cells of a sponge are “stuck” to the inner cells by a gel-like layer that serves as a biological “glue”.
- A.
  
  Spicules
- B.
  
  Mesozoic
- C.
  
  Mesoglea
- D.
  
  Mesopotamia
10.

Within the mesoglea are microscopic structures that appear as toy “jacks”, and serve to support the sponge.
11.

In the Ediacaran Period, most faunal assemblages possessed no hard parts.
- A.
  
  True
- B.
  
  False
12.

What Phylum are sponges categorized as?
- A.
  
  Mollusca
- B.
  
  Cnidaria
- C.
  
  Animalia
- D.
  
  Porifera
13.

The body of this class of sponge is composed of the protein “Spongin”, similar to hair/fingernail composition.
- A.
  
  Calcarea
- B.
  
  Demospongiae
- C.
  
  Sclerospongiae
- D.
  
  Hexactinellida
14.

Containing 6-ray silica spicules and forming beautiful glass skeletons of SiO2, the "glass" sponges are in what class of sponges?
- A.
  
  Calcarea
- B.
  
  Hexactinellida
- C.
  
  Demospongiae
- D.
  
  Sclerospongiae
15.

These complex, "coralline" sponges create stony skeletons of CaCO3, silica spicules, and spongin are in what class of sponges?
- A.
  
  Sclerospongiae
- B.
  
  Calcarea
- C.
  
  Demospongiae
- D.
  
  Hexactinellida