Phylum Annelida Quiz: Phylum Ctenophora!
Welcome to another quiz on our long going series on Phylum Annelida. This quiz will cover Lower Invertebrates such as Phylum Ctenophora. I suggest you take notes on the answers you do wrong.
Questions and Answers
- 1.
Ctenophores posess eight comb rows composed of long, fused ______.
Explanation
Ctenophores, also known as comb jellies, have eight comb rows that are made up of long, fused cilia. Cilia are hair-like structures that are found on the surface of many organisms and are involved in various functions such as locomotion and feeding. In the case of ctenophores, the cilia in their comb rows beat in a coordinated manner, creating a beautiful shimmering effect and allowing them to move through the water. The fusion of the cilia in each comb row gives them a stronger and more efficient beating motion, enabling ctenophores to swim and capture their prey effectively.Rate this question:
- 2.
Ctenophores do not possess nematocysts, instead they have adhesive prey capturing cells called _________.
Explanation
Each colloblast cell consists of bulbous, sticky head connected to a long, straight filament and a spiral, contractile filament.Rate this question:
- 3.
In Ctenophores, what are used for locomotion?
- A.
Ctene
- B.
Costae
- C.
Apical sense
- D.
Pharynx
Correct Answer
B. CostaeExplanation
The body of ctenophores has ctene which is organized into 8 comb rows. These comb rows = costae stretch from oral to aboral surface and the function is for locomotion.Rate this question:
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- 4.
The free-living platyhelminths are usually considered the most primitive bilateral animals and the 1st group to have evolved a true ______________.
Correct Answer
mesodermExplanation
It is believed that all coelomate animals may evolved from flatworm-like ancestors.Rate this question:
- 5.
Flatworms osmoregulates through a specialized organ called __________.
- A.
Syncytial layer
- B.
Microvillus
- C.
Tegument
- D.
Protonephridia
Correct Answer
D. ProtonephridiaExplanation
Protonephridia (first kidney) is a specialized organ in flatworms osmoregulation and it also helps eliminating other matabolic wastes such as ammonia, urea and amino acid.Rate this question:
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- 6.
Light-sensitive sense organs in the flatworms are called ______.
- A.
Rheoreceptors
- B.
Ocelli
- C.
Scolex
- D.
Proglottids
Correct Answer
B. OcelliExplanation
Ocelli are light-sensitive sense organs found in flatworms. These organs help flatworms detect changes in light intensity and direction, allowing them to respond to their environment. Ocelli are simple eyes that can detect the presence or absence of light, but they cannot form images like more complex eyes. Flatworms use their ocelli to navigate and find food sources, as well as to avoid predators. Therefore, ocelli are the correct answer for the light-sensitive sense organs in flatworms.Rate this question:
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- 7.
The human liver fluke, Clonorchis sinensis, is common in China, and can cause cirrhosis of the liver and death.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because Clonorchis sinensis, also known as the human liver fluke, is indeed common in China. This parasitic worm infects the liver and can cause various health problems, including cirrhosis of the liver. If left untreated, it can lead to severe complications and even death.Rate this question:
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- 8.
Members in the Phylum Nematoda possess a pair of lateral sensory organs called _______.
Correct Answer
amphids
amphidExplanation
Members in the Phylum Nematoda possess a pair of lateral sensory organs called amphids. Amphids are specialized chemosensory organs that are located on the head of nematodes. They play a crucial role in detecting chemicals in the environment and are involved in various sensory functions such as finding food, mates, and avoiding predators. These sensory organs are important adaptations that enable nematodes to survive and thrive in their habitats.Rate this question:
- 9.
Most nematodes are _______. Males are smaller than females and may have an accessory _______ structure.
- A.
Monoceious; amoeboid
- B.
Asexual; amoeboid
- C.
Dioecious; copulatory
- D.
Hermaphroditic; copulatory
Correct Answer
C. Dioecious; copulatoryExplanation
Most of members in Phylum Nematoda are dioecious with amoeboid sperm, and males are smaller than females and have a bent tail for holding female for copulation.Rate this question:
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- 10.
Which is NOT TRUE about the cuticle functions in nematodes?
- A.
As a hook to burrow into muscle tissue forming cysts for parasitic nematodes.
- B.
As a barrier and provides protection.
- C.
As a sensory array where it can detects changes in the environment.
- D.
As a hydrostatic skeleton to help in locomotion.
Correct Answer
A. As a hook to burrow into muscle tissue forming cysts for parasitic nematodes.Explanation
The cuticle functions in nematodes include acting as a barrier and providing protection, serving as a sensory array to detect changes in the environment, and functioning as a hydrostatic skeleton to aid in locomotion. However, it is not true that the cuticle acts as a hook to burrow into muscle tissue and form cysts for parasitic nematodes.Rate this question:
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- 11.
A rasping radula is characteristic of all mollusks EXCEPT _________.
- A.
Bivalves
- B.
Gastropods
- C.
Cephalopods
- D.
Chitons
Correct Answer
A. BivalvesExplanation
Of all mollusks, only the bivalves lack a radula.Rate this question:
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- 12.
The only class of mollusk to have a closed circulatory system includes the _______.
- A.
Brachiopod
- B.
Snail
- C.
Oyster
- D.
Octopus
Correct Answer
D. OctopusExplanation
Only members of Class Cephalopoda (e.g squid, octopus) in mollusk have a closed circulatory system.Rate this question:
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- 13.
The leech characteristic, _______________ , shared with oligochaetes is part of the evidence that leeches evolved from oligochaetes.
- A.
Suckers
- B.
Metameric segmentation
- C.
Clitellum
- D.
Parapodia
Correct Answer
C. ClitellumExplanation
Both of subclasses Hirudinea (e.g leeches) Oligochaeta are placed under Class Clitellata (having a clitellum).Rate this question:
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- 14.
Sexually, earthworms are _____________.
- A.
Separate sexed
- B.
Hermaphroditic but not self-fertilizing
- C.
Parthenogenic
- D.
Hermaphroditic and self-fertilizing
Correct Answer
B. Hermaphroditic but not self-fertilizingExplanation
Earthworms are hermaphroditic, meaning they have both male and female reproductive organs. However, they are not self-fertilizing, which means they cannot fertilize their own eggs with their own sperm. Instead, earthworms must mate with another earthworm in order to reproduce.Rate this question:
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- 15.
Annelida and Mollusca shared a characteristic by having a trochophore larvae during their first larval stage.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Annelida and Mollusca both exhibit a trochophore larvae during their initial larval stage. This characteristic is a shared trait between the two phyla.Rate this question:
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Current Version
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Mar 21, 2023Quiz Edited by
ProProfs Editorial Team -
Nov 20, 2015Quiz Created by
Wnurainie
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