Bio1331 Animals - Evolution - Major Diploblast Groups (Lecture Three)
16 Questions
| Total Attempts: 45
Questions and Answers
- 1.What is the 'scientific' name for the sponges?
- 2.How many species of porifera are there?
- A.
15,000+
- B.
150+
- C.
1,500+
- D.
150,000+
- 3.Complete the following sentence.Porifera are characterised by aggregations of cells around a water canal system, extracellular matrix of collagen, glycoproteins and skeletal elements called _______.
- 4.Which of the following do Porifera NOT have?You may tick more than one.
- A.
Cell layers
- B.
Organs
- C.
Symmetry
- D.
Nerves
- E.
Muscles
- F.
An osculum
- G.
Choanocytes
- H.
Spicules
- I.
Water canal system
- 5.Complete the following sentence:In the blastula of the Glass Sponge, micromeres and macromeres merge to form a multinucleated '_________________'.
- 6.Name a clade of Cnidarian.
- 7.Complete the following sentence: All cnidarians are carnivores, using toxins in ________ to subdue prey.
- 8.The phospholipases in toxins cause paralysis.How do they do this?
- A.
Interfering with neurotransmission
- B.
Lysing cell membranes
- C.
Damaging muscle cells
- 9.The cnidarian gut is a blind sac called the ____________________.
- 10.True or False?Cnidarians are diploblastic.
- A.
True
- B.
False
- 11.What is the 'scientific' name for corals?
- 12.Complete the following sentence:Anthozoan polyps form a skeleton by secreting a matrix of organic molecules on which they deposit _____________.
- 13.Name the symbiotic, unicellular, photosynthetic algae that anthozoans host in their tentacles.
- 14.What causes bleaching in corals?
- A.
Stress-induced expulsion of zooxanthellae
- B.
Gaining of zooxanthellae
- C.
Over-production of calcium carbonate
- D.
Under-production of calcium carbonate
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