Phylum Platyhelminthes Quiz: Class Turbellaria
Welcome to the Phylum Platyhelminthes Quiz! This quiz is designed to test your knowledge about the fascinating world of flatworms, including parasitic tapeworms and free-living planarians. Explore their unique anatomy, life cycles, and ecological roles as you answer questions about these intriguing invertebrates. Whether you're a student, a biology enthusiast, or simply curious about flatworms, this quiz offers a fun and educational challenge. Learn interesting facts about their regeneration abilities, reproductive strategies, and more. Dive into the quiz and see how much you know about the diverse members of the phylum Platyhelminthes! Good luck!
Phylum Platyhelminthes Questions and Answers
- 1.
How many species are found in the class Turbellaria?
- A.
Over 200
- B.
Over 300
- C.
Over 400
- D.
Over 450
Correct Answer
B. Over 300Explanation
The class Turbellaria, which includes free-living flatworms such as planarians, comprises over 450 species. These flatworms are known for their remarkable regenerative abilities and diverse habitats.Rate this question:
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- 2.
Most in the class Turbellaria are ____ cm up to ___ cm
- A.
1, 50
- B.
1, 30
- C.
1, 100
Correct Answer
A. 1, 50Explanation
Most of the Turbellaria in the class are typically around 1 cm in length, with some individuals growing up to 50 cm. These free-living flatworms exhibit a wide range of sizes, adapting to various habitats.Rate this question:
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- 3.
Species in the class turbellaria are _________ and predators.
Correct Answer
scavengersExplanation
Species in the class turbellaria are scavengers because they feed on dead organic matter and other small organisms. They are not parasites or herbivores, as they do not rely on living hosts or plants for their food source. Instead, they actively hunt and consume prey, making them predators in their ecosystem.Rate this question:
- 4.
Rhabdites are ___ like specialized ________ cells that form the protective _______ sheath.
Correct Answer
rod, epidermal, mucousExplanation
Rhabdites are rod-like specialized epidermal cells that form the protective mucous sheath. These cells are responsible for producing and secreting mucus, which helps in various functions such as lubrication, protection against pathogens, and facilitating movement. The rod-like shape of rhabdites allows them to align closely together, forming a cohesive and efficient protective layer.Rate this question:
- 5.
Turbellarians have _______ glands and ________ glands. The first attaches to substrates. The latter releases a chemical to dissolve sticky substrate.
Correct Answer
adhesive, releaserExplanation
Turbellarians have adhesive glands and releaser glands. The adhesive glands allow them to attach to substrates, while the releaser glands release a chemical that dissolves sticky substrates.Rate this question:
- 6.
Turbellarians move by ______ using cilia and/or muscular ________.
Correct Answer
gliding, undulationsExplanation
Turbellarians move by gliding, which means they smoothly slide over surfaces. They achieve this movement by using cilia, which are hair-like structures that beat in coordinated waves, and/or muscular undulations, which are rhythmic contractions and relaxations of their muscles.Rate this question:
- 7.
Digestion in turbellarians is partly _______; enzymes secreted from _________ glands break down food outside the body.
Correct Answer
extracellular, pharyngealExplanation
Turbellarians have an extracellular digestion process, meaning that food is broken down outside the body. Enzymes are secreted from the pharyngeal glands to aid in the breakdown of food.Rate this question:
- 8.
Waste and gas exchange occurs by ________ through the body wall.
Correct Answer
diffusionExplanation
Waste and gas exchange in the body occurs through diffusion, which is the process of molecules moving from an area of high concentration to an area of low concentration. In this case, waste and gases move across the body wall through diffusion, allowing for the exchange of these substances between the internal and external environments.Rate this question:
- 9.
___________ turbellarians are in osmotic balance with their environment .
- A.
Freshwater
- B.
Marine
Correct Answer
B. MarineExplanation
Marine turbellarians are in osmotic balance with their environment because they live in saltwater, which has a higher concentration of solutes compared to their body fluids. This allows them to maintain a stable internal environment by osmosis, where water and solutes move across their cell membranes to equalize the concentration on both sides. As a result, they do not gain or lose excessive amounts of water or solutes, ensuring their osmotic balance.Rate this question:
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- 10.
Freshwater turbellarians are ____________ with their environment
Correct Answer
hypertonicExplanation
Freshwater turbellarians are hypertonic with their environment. This means that the concentration of solutes in their body fluids is higher than the concentration of solutes in the surrounding freshwater. As a result, water tends to move into their bodies through osmosis, causing them to constantly excrete excess water and maintain a balance of solutes. This adaptation allows them to survive in freshwater environments where they are constantly exposed to a hypotonic environment.Rate this question:
- 11.
The turbellarians nervous system ranges from primitive ______ ___ to a ______ like system.
Correct Answer
nerve net, ladderExplanation
The statement suggests that the turbellarians have a nervous system that varies in complexity. The first part of the statement indicates that their nervous system can be primitive, which suggests a nerve net organization. The second part of the statement suggests that their nervous system can also be more advanced, resembling a ladder-like system. Therefore, the correct answer is nerve net, ladder.Rate this question:
- 12.
Have sensory and ______ neurons and they are capable of integrating and responding to _______.
Correct Answer
motor, stimuliExplanation
Motor neurons and sensory neurons are two types of neurons in the nervous system. Motor neurons transmit signals from the central nervous system to muscles or glands, allowing for movement and response. Sensory neurons, on the other hand, receive information from sensory receptors and transmit it to the central nervous system for processing. Both types of neurons are capable of integrating and responding to stimuli, which are any changes in the environment that can be detected by the sensory system.Rate this question:
- 13.
________ are sensory lobes projecting from the side of the head containing _______ receptors.
Correct Answer
Auricles, chemoExplanation
Auricles are sensory lobes projecting from the side of the head. These auricles contain chemo receptors, which are responsible for detecting chemical stimuli.Rate this question:
- 14.
Turbellarians have ______ which are photosensitive areas containing ______ receptors.
Correct Answer
ocelli, photoExplanation
Turbellarians have ocelli, which are photosensitive areas containing photo receptors. Ocelli are simple eyes found in many invertebrates, including flatworms like turbellarians. These eyes are capable of detecting light and are important for sensing changes in light intensity or direction. The photo receptors within the ocelli allow turbellarians to perceive and respond to light stimuli in their environment.Rate this question:
- 15.
During asexual reproduction, _______ fission is used that creats two new animals called _____.
Correct Answer
transverse, zooidsExplanation
During asexual reproduction, transverse fission is used, where the parent organism divides into two equal parts horizontally. This process creates two new animals called zooids. Zooids are individual organisms that are capable of independent existence and can function as a separate entity.Rate this question:
- 16.
Reproductive organs are __________ in origin.
Correct Answer
mesodermalExplanation
Reproductive organs are mesodermal in origin. This means that they develop from the mesoderm, one of the three primary germ layers in the early embryo. The mesoderm gives rise to various structures in the body, including the reproductive system. This includes the formation of the gonads (ovaries or testes), as well as other structures such as the uterus, fallopian tubes, and vas deferens. The mesodermal origin of reproductive organs is a fundamental aspect of their development and function.Rate this question:
- 17.
Typically ______ __________ with direct development.
Correct Answer
cross fertilizeExplanation
Typically, cross fertilize refers to the process of combining different ideas or concepts to create something new. In the context of the given question, it implies that cross fertilization occurs in a specific way, most likely in relation to direct development. This suggests that the process of cross fertilization is closely connected to the concept of direct development.Rate this question:
- 18.
Examples of Turbellarians are:
- A.
Schistosomes
- B.
Dugesia
- C.
Metacercaria
- D.
Convaluta
Correct Answer(s)
B. Dugesia
D. ConvalutaExplanation
The correct answer includes the names "dugesia" and "Convaluta". These are examples of Turbellarians, which are a group of flatworms. Turbellarians are free-living, non-parasitic flatworms found in freshwater and marine environments. Dugesia is a genus of freshwater planarians, while Convaluta is a genus of marine flatworms.Rate this question:
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Current Version
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Jun 10, 2024Quiz Edited by
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Expert Reviewed by
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Oct 24, 2010Quiz Created by
Colleennicole
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