Phylum Platyhelminthes Quiz: Class Turbellaria

2.

Most in the class Turbellaria are __ cm up to _ cm

1, 50
1, 30
1, 100

Correct Answer

A. 1, 50

Explanation

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.

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1

3.

Species in the class turbellaria are _________ and predators.

Correct Answer
scavengers

Explanation
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.

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4.

Rhabdites are _ like specialized cells that form the protective _ sheath.

Correct Answer
rod, epidermal, mucous

Explanation
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.

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2

5.

Turbellarians have _ glands and __ glands. The first attaches to substrates. The latter releases a chemical to dissolve sticky substrate.

Correct Answer
adhesive, releaser

Explanation
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.

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6.

Turbellarians move by using cilia and/or muscular __.

Correct Answer
gliding, undulations

Explanation
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.

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7.

Digestion in turbellarians is partly _; enzymes secreted from ___ glands break down food outside the body.

Correct Answer
extracellular, pharyngeal

Explanation
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.

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8.

Waste and gas exchange occurs by ________ through the body wall.

Correct Answer
diffusion

Explanation
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.

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9.

___________ turbellarians are in osmotic balance with their environment .

Freshwater
Marine

Correct Answer

A. Marine

Explanation

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.

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10.

Freshwater turbellarians are ____________ with their environment

Correct Answer
hypertonic

Explanation
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.

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11.

The turbellarians nervous system ranges from primitive ____ _ to a ______ like system.

Correct Answer
nerve net, ladder

Explanation
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.

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12.

Have sensory and neurons and they are capable of integrating and responding to _.

Correct Answer
motor, stimuli

Explanation
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.

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13.

__ are sensory lobes projecting from the side of the head containing _ receptors.

Correct Answer
Auricles, chemo

Explanation
Auricles are sensory lobes projecting from the side of the head. These auricles contain chemo receptors, which are responsible for detecting chemical stimuli.

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14.

Turbellarians have which are photosensitive areas containing receptors.

Correct Answer
ocelli, photo

Explanation
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.

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15.

During asexual reproduction, ___ fission is used that creats two new animals called _.

Correct Answer
transverse, zooids

Explanation
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.

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16.

Reproductive organs are __________ in origin.

Correct Answer
mesodermal

Explanation
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.

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17.

Typically ____ with direct development.

Correct Answer
cross fertilize

Explanation
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.

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18.

Examples of Turbellarians are:

Schistosomes
Dugesia
Metacercaria
Convaluta

Correct Answer(s)

A. Dugesia
A. Convaluta

Explanation

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.

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Phylum Platyhelminthes Quiz: Class Turbellaria

How many species are found in the class Turbellaria?

Quiz Preview

Most in the class Turbellaria are __ cm up to _ cm

Species in the class turbellaria are _________ and predators.

Rhabdites are _ like specialized cells that form the protective _ sheath.

Turbellarians have _ glands and __ glands. The first attaches to substrates. The latter releases a chemical to dissolve sticky substrate.

Turbellarians move by using cilia and/or muscular __.

Digestion in turbellarians is partly _; enzymes secreted from ___ glands break down food outside the body.

Waste and gas exchange occurs by ________ through the body wall.

___________ turbellarians are in osmotic balance with their environment .

Freshwater turbellarians are ____________ with their environment

The turbellarians nervous system ranges from primitive ____ _ to a ______ like system.

Have sensory and neurons and they are capable of integrating and responding to _.

__ are sensory lobes projecting from the side of the head containing _ receptors.

Turbellarians have which are photosensitive areas containing receptors.

During asexual reproduction, ___ fission is used that creats two new animals called _.

Reproductive organs are __________ in origin.

Typically ____ with direct development.

Examples of Turbellarians are:

Phylum Platyhelminthes Quiz: Class Turbellaria

How many species are found in the class Turbellaria?

Quiz Preview

Most in the class Turbellaria are ____ cm up to ___ cm

Species in the class turbellaria are _________ and predators.

Rhabdites are ___ like specialized ________ cells that form the protective _______ sheath.

Turbellarians have _______ glands and ________ glands. The first attaches to substrates. The latter releases a chemical to dissolve sticky substrate.

Turbellarians move by ______ using cilia and/or muscular ________.

Digestion in turbellarians is partly _______; enzymes secreted from _________ glands break down food outside the body.

Waste and gas exchange occurs by ________ through the body wall.

___________ turbellarians are in osmotic balance with their environment .

Freshwater turbellarians are ____________ with their environment

The turbellarians nervous system ranges from primitive ______ ___ to a ______ like system.

Have sensory and ______ neurons and they are capable of integrating and responding to _______.

________ are sensory lobes projecting from the side of the head containing _______ receptors.

Turbellarians have ______ which are photosensitive areas containing ______ receptors.

During asexual reproduction, _______ fission is used that creats two new animals called _____.

Reproductive organs are __________ in origin.

Typically ______ __________ with direct development.

Examples of Turbellarians are:

Most in the class Turbellaria are __ cm up to _ cm

Rhabdites are _ like specialized cells that form the protective _ sheath.

Turbellarians have _ glands and __ glands. The first attaches to substrates. The latter releases a chemical to dissolve sticky substrate.

Turbellarians move by using cilia and/or muscular __.

Digestion in turbellarians is partly _; enzymes secreted from ___ glands break down food outside the body.

The turbellarians nervous system ranges from primitive ____ _ to a ______ like system.

Have sensory and neurons and they are capable of integrating and responding to _.

__ are sensory lobes projecting from the side of the head containing _ receptors.

Turbellarians have which are photosensitive areas containing receptors.

During asexual reproduction, ___ fission is used that creats two new animals called _.

Typically ____ with direct development.