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WorksheetsPHYLUM PORIFERA & CNIDARIA - INVERTEBRATE ZOOLOGY
Total questions: 40
Worksheet time: 33mins
1. These are the flat, thin cells that cover the exterior of a sponge, forming a layer called the
pinacoderm.
Pinocytes
Pinacocytes
Porocytes
Pinococytes
2. The cells of sponges are arranged in a gelatinous matrix called ___________.
Ameobocytes
Pinacocytes
Mesohyl
Mesophyll
3. This is a collagenous protein material that serves to support sponges.
Spicules
Spongin
Archaeocytes
Pinacocytes
4. The water is filtered and exits in sponges via a large opening called an _____________.
Ostia
Osculum
Excurrent Canal
Incurrent Canal
5. The simplest and least common sponge body form. The canal system is generally small and tube-shaped. Water enters these sponges via tiny ostia in the dermis and makes its way
to a large cavity called a spongocoel, which is lined with choanocytes and exits via a large opening called an osculum.
Ascon
Sycon
Leucon
Either A or B
6. A type of sponges that has an extensively branched canal system. It is characterized by a cluster of flagellated chambers that receive water from incurrent canals, and discharged water exits via the excurrent canals and eventually to the osculum.
Ascon
Sycon
Leucon
Both B & C
7. These sponges resemble large versions of asconoid sponges. These sponges possess a tubular body with a single prominent osculum, it has a more complex canal system than asconoid sponges.
Ascon
Sycon
Leucon
Both B & C
8. What type of symmetry do sponges (Porifera) have?
Bilateral
Radial
Biradial
Asymmetrical
9. Most sponges are hermaphrodites. What does this mean?
sponges can produce sperm only
sponges cannot reproduce
sponges are monoecious
sponges can produce eggs only
10. Cells that have a sticky, funnel-shaped collar to collect food particles and a flagellum that creates a water current
Amoebocyte
Pinacocyte
Mesohyl
Choanocyte
11. What does the term Porifera mean?
Pore-bearing
Cell-bearing
Sponge-bearing
Bud-bearing
12. What is the space between the ectoderm and the endoderm that contains amoebocytes and spicules?
Pinacoderm
Mesohyl
Choanocytes
Amoebocyte
13. Which of the following is NOT a characteristic of sponges?
Body wall penetrated by many pores.
Collar cells that trap food particles.
Cells are organized into tissues.
Amoebocytes that transport food.
14. Sponges with six rayed spicules made of silica.
Class Calcarea
Class Demospongiae
Class Hexactinellida
Both B & C
15. What type of reproduction do sponges perform?
Sexual reproduction
Asexual Reproduction (budding)
Asexual Reproduction (gemmules)
All of the above
16. A gelatinous nonliving substance that exists between the epidermis and the gastrodermis of Cnidarians.
Mesohyl
Mesoglea
Mesophyll
Mesenchyme
17. The Cnidarian nervous system is very simple. Instead of a developed brain with a complex nervous system, they have a:
Nerve net
Nerve cells
Nerve ring
Both A & C
18. To protect themselves, some cnidaria have
stinging cells
stabbing points
poison sacs
biting teeth
19. Which of the following is a correct description of the polyp body form?
It is sessile and the tentacles and mouth point downward.
It is mobile and the tentacles and mouth point downward.
It is sessile and the mouth and tentacles point upward.
It is mobile and the tentacles and mouth point upward.
20. Which of the following is a correct description of the Cnidarian digestive tract?
A complete digestive tract consisting of two openings.
An incomplete digestive tract consisting of one opening.
A complete digestive tract consisting of one opening
An incomplete digestive tract consisting of two openings.
21. Triploblasty is a condition of the gastrula in which there are three primary germ layers: the external __________, middle__________, and internal __________.
Endoderm, ectoderm, & mesoderm
Ectoderm, mesoderm, & endoderm
Mesoderm, ectoderm, & endoderm
Ectoderm, endoderm, & mesoderm
22. Corals and anemones are part of Class __________
Anthozoa
Scyphozoa
Hydrozoa
Cubozoa
23. A cnidarian body plan characterized by a bowl shape and adapted for a free-swimming life.
Polyp
Medusa
Cnidae
None of the above
24. In many cnidarians, zooxanthellae live within their tissues. Zooxanthellae are a type of
Plant
Animals
Algae
All of the above.
25. Characteristics of cnidarians includes all of the following except
Nematocysts
Choanocytes
Gastrovascular cavity
Tentacles
26. Cnidarians are dimorphic, meaning they have
Two choanocytes
Two tissue layers
Two tentacles
Two body shapes
27. The outer cell layer of the cnidarian is the
Gastrodermis
Mesoglea
Endoderm
Epidermis
28. Many cnidarians have two distinct life stages (or body styles) called
The gametophyte and the sporophyte
The polyp and the medusa
Egg and adult
Egg and Larva
29. Which of the following statements is NOT true?
A medusa is the sessile form of a cnidarian.
Cnidarians can reproduce sexually.
A cnidarian uses its tentacles to capture food.
Coral and hydras are examples of cnidarians
30. Which of the following is not a characteristic of Cnidaria?
Gastrovascular cavity
Radial/Biradial Symmetry
Gastrovascular Cavity
Triploblastic development
31. Identification
Name of the structure 6 (central cavity)
Image Souce: Pendarvis, M. P., & Crawley, J. L. (2011). Exploring in the Laboratory Biology. Morton Publishing Company.
(a)
32. Identification
What do you call number 9 (gelatinous
matrix)
Image Source: Pendarvis, M. P., & Crawley, J. L. (2011). Exploring in the Laboratory Biology. Morton Publishing Company.
(a)
33. Identification
Number 3 (specialized cells that regulate water circulation)
Image Source: Pendarvis, M. P., & Crawley, J. L. (2011). Exploring in the Laboratory Biology. Morton Publishing Company.
(a)
34. Identification
Name of the specialized cell number 2 (Comes from sclerocytes)
Image Source: Pendarvis, M. P., & Crawley, J. L. (2011). Exploring in the Laboratory Biology. Morton Publishing Company.
(a)
What type of body form is exhibited of this sponge.
Image Source: Pendarvis, M. P., & Crawley, J. L. (2011). Exploring in the Laboratory Biology. Morton Publishing Company.
(a)
36. Type of body plan exhibited.
Image Source: Pendarvis, M. P., & Crawley, J. L. (2011). Exploring in the Laboratory Biology. Morton Publishing Company.
(a)
37. Identification: Number 2
Image Source: Pendarvis, M. P., & Crawley, J. L. (2011). Exploring in the Laboratory Biology. Morton Publishing Company.
(a)
38. Identification: Number 4
Image Source: Pendarvis, M. P., & Crawley, J. L. (2011). Exploring in the Laboratory Biology. Morton Publishing Company.
(a)
39. Identification: Specialized Cell number 5
Image Source: Pendarvis, M. P., & Crawley, J. L. (2011). Exploring in the Laboratory Biology. Morton Publishing Company.
(a)
40. Who is your instructor in SPCL 3: Invertebrate Zoology? (Don't put Title e.g. Sir, Mr)
(a)
