7th Grade Sponges, Cnidarians

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| By Dsullivan

Dsullivan

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Quizzes Created: 2 | Total Attempts: 1,664

Questions: 10 | Attempts: 191 | Updated: Dec 2, 2024

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Sponges and Cnidarians are both invertebrates but belong to a different class of organisms. Sponges lack symmetry whereas cnidarians have radial symmetry. What more can you tell about these aquatic species? Take up the simple quiz below and jog your memory on these two sets of invertebrates. All the best!

Questions and Answers

1.

The word larva's defintion is....
- A.
  
  A newly born egg that is prettier than mother
- B.
  
  An immature form of an animal
- C.
  
  A group of little cells
Correct Answer
B. An immature form of an animal

Explanation
The correct answer is "an immature form of an animal." A larva is a developmental stage in the life cycle of many animals, including insects, amphibians, and some fish. It is characterized by its distinct morphology and physiology, which are different from the adult form. Larvae undergo metamorphosis to transform into their adult form. This answer accurately describes the definition of a larva as an immature stage in the life cycle of an animal.

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1
0
2.

TRue or False?The structure of sponges is:No symmetry, opening at two ends. hollow nag, collar cells, neutral cells, jelly-like cells, tiny pores that cover surfaceIf incorrect how many errors are in above sentence

Correct Answer
False, 3

Explanation
The given sentence describes the structure of sponges as having no symmetry, an opening at two ends, a hollow nag, collar cells, neutral cells, jelly-like cells, and tiny pores that cover the surface. However, this description is incorrect. The correct structure of sponges includes asymmetry, an opening at one end, a central cavity, collar cells, and tiny pores called ostia that cover the surface. Therefore, there are three errors in the given sentence.

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4
3.

Colony means..
- A.
  
  A gruop of individual animals
- B.
  
  A state and or city
- C.
  
  A large amount of condensed material
- D.
  
  A sinking material
Correct Answer
A. A gruop of individual animals

Explanation
Colony refers to a group of individual animals that live together and function as a unit. This term is commonly used to describe social insects like ants, bees, and termites, where each individual has a specific role within the colony. They work together to build and maintain their nests, gather food, and protect the colony.

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4.

True or False?Sponges are filter feeders and absorb oxygen in dissolved water.Filter feeders are small organisms in water
- A.
  
  True
- B.
  
  False
- C.
  
  Don't know
Correct Answer
A. True

Explanation
Sponges are indeed filter feeders, meaning they obtain their food by filtering water and extracting nutrients from it. They have specialized cells called choanocytes that create water currents and capture small particles, including bacteria and organic matter, for consumption. Additionally, sponges do absorb oxygen from the water through their cells, as they lack specialized respiratory organs. Therefore, the statement "Sponges are filter feeders and absorb oxygen in dissolved water" is true.

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1
0
5.

Coral Reef definition is.....
- A.
  
  A home built by cnidarians
- B.
  
  A valley of dormat sponges
- C.
  
  A hollow rock that is eroded by water
Correct Answer
B. A valley of dormat sponges
6.

Cnidarians are
- A.
  
  A series or dormat species that live in species
- B.
  
  A species of non moving sponges
- C.
  
  Organisms that take in food through a cavity anh have stinging cells
- D.
  
  None of the above
- E.
  
  All of the above, but D
Correct Answer
C. Organisms that take in food through a cavity anh have stinging cells

Explanation
Cnidarians are organisms that take in food through a cavity and have stinging cells. Cnidarians include jellyfish, sea anemones, and coral. They have a central body cavity called a gastrovascular cavity, which serves both as a digestive chamber and a means of distributing nutrients throughout the body. Cnidarians also possess specialized cells called cnidocytes, which contain stinging structures called nematocysts. These stinging cells are used for defense and capturing prey. Therefore, the correct answer is organisms that take in food through a cavity and have stinging cells.

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7.

Poly defintion is..... and medusa defintion is...
- A.
  
  Vase shaped body plan...Worm shaped body plan
- B.
  
  Worm shaped body plan...head shaped body plan
- C.
  
  Vase shaped body plan......bowl shaped body plan
- D.
  
  None of the above
Correct Answer
C. Vase shaped body plan......bowl shaped body plan

Explanation
The correct answer is "Vase shaped body plan......bowl shaped body plan." This means that the poly definition refers to a vase-shaped body plan, while the medusa definition refers to a bowl-shaped body plan.

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8.

List Sponge adaptations

Correct Answer
1.Spike cells for structure and protection

Explanation
The given answer states that sponge adaptations include spike cells for structure and protection. This means that sponges have developed specialized cells with spiky structures that serve the purpose of providing support and protection to the sponge. These spike cells help maintain the shape and structure of the sponge, as well as deter predators from feeding on them. By having spike cells, sponges are able to thrive in their aquatic environments and survive various challenges they may face.

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4
9.

True or False...if false what are the correctionsLife Cycle of sponges is they can reproduce sexually or asexuallythe eggs hatch into larva and grow into adults
- A.
  
  True
- B.
  
  False
- C.
  
  False......no larva
Correct Answer
A. True

Explanation
The statement is true. The life cycle of sponges involves both sexual and asexual reproduction. The eggs hatch into larvae, which then develop into adult sponges.

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10.

Cnidarians get food byusing their __________ and then _______prey. The__________pull pray until thread like stucture explodes out. This may release venom

Correct Answer
a. stinging cells b.sting c.tentacles

Explanation
Cnidarians get food by using their stinging cells to sting prey. The tentacles pull prey until a thread-like structure explodes out, which may release venom.

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1
4 0

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Current Version
Dec 02, 2024

Quiz Edited by
ProProfs Editorial Team
Mar 08, 2010

Quiz Created by
Dsullivan

7th Grade Sponges, Cnidarians

The word larva's defintion is....

TRue or False?The structure of sponges is:No symmetry, opening at two ends. hollow nag, collar cells, neutral cells, jelly-like cells, tiny pores that cover surfaceIf incorrect how many errors are in above sentence

Colony means..

True or False?Sponges are filter feeders and absorb oxygen in dissolved water.Filter feeders are small organisms in water

Coral Reef definition is.....

Cnidarians are

Poly defintion is..... and medusa defintion is...

List Sponge adaptations

True or False...if false what are the correctionsLife Cycle of sponges is they can reproduce sexually or asexuallythe eggs hatch into larva and grow into adults

Cnidarians get food byusing their __________ and then _______prey. The__________pull pray until thread like stucture explodes out. This may release venom

Cnidarians get food byusing their ______ and then _prey. The________pull pray until thread like stucture explodes out. This may release venom