Quiz Platyhelminthes

2.

Platyhelminthes demonstarte an increase in complexity over Cnidaria

True
False

Correct Answer

A. True

Explanation

Platyhelminthes, also known as flatworms, demonstrate an increase in complexity over Cnidaria, which includes jellyfish and sea anemones. This is because Platyhelminthes have a more advanced body structure and organ systems compared to Cnidaria. Flatworms have bilateral symmetry, a centralized nervous system, and specialized organs for digestion and excretion. In contrast, Cnidaria have radial symmetry, a decentralized nerve net, and a simpler digestive system. Therefore, it can be concluded that Platyhelminthes are more complex in terms of their anatomical organization and physiological functions than Cnidaria.

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8

3.

Platyhelminthes often alternate between __ and reproduction, this is referred to as of _

Correct Answer
sexual asexual alternation generations
asexual sexual alternation generations
asexual, sexual, generations
sexual, asexual, generations

Explanation
Platyhelminthes often alternate between sexual and asexual reproduction, this is referred to as alternation of generations. This means that they have a reproductive cycle where they reproduce both sexually and asexually in different generations. In some generations, they reproduce sexually, while in others they reproduce asexually. This allows them to have genetic diversity through sexual reproduction and rapid population growth through asexual reproduction.

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4

4.

Platyhelminthe phylum includes the classes____

Turbellaria
Nematoda
Cestoda
Trypanosoma
Schistosoma
Trematoda
Monogenea
Acoela

Correct Answer(s)

A. Turbellaria
A. Cestoda
A. Trematoda
A. Monogenea

Explanation

The correct answer includes the classes Turbellaria, Cestoda, Trematoda, and Monogenea. These classes belong to the phylum Platyhelminthe, which is commonly known as flatworms. Turbellaria are free-living flatworms, Cestoda are tapeworms, Trematoda are flukes, and Monogenea are ectoparasitic flatworms. These classes share similar characteristics such as having a flat body shape and lacking a true body cavity.

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4

5.

Platyhelminthes are an example of_______

Segmentation
Serial repetition
Coelomate body plan
Radial symmetry

Correct Answer

A. Serial repetition

Explanation

Platyhelminthes, also known as flatworms, exhibit serial repetition in their body structure. This means that their body is composed of repeated segments or units along the length. Each segment contains the same set of organs and systems, allowing for efficient movement and coordination. This characteristic of serial repetition is seen in various flatworm species, enabling them to adapt to different environments and perform specific functions within each segment. Therefore, the correct answer is serial repetition.

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3

6.

Platyhelmithes have a and skin.

Correct Answer
ciliated permeable

Explanation
Platyhelminthes have a ciliated permeable skin. This means that their skin is covered in tiny hair-like structures called cilia, which help with movement and feeding. Additionally, their skin is permeable, allowing for the exchange of gases and nutrients with the environment. This adaptation is important for flatworms, as it enables them to efficiently obtain oxygen and nutrients through their skin, despite lacking a specialized respiratory or circulatory system.

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1

7.

The consequences of having such skin properties include:

Resistance to desication
Vulnerability to water in-flow
Modification to resist attack
In danger of water loss
Attack predators
Asisting attachment

Correct Answer(s)

A. Vulnerability to water in-flow
A. Modification to resist attack
A. In danger of water loss
A. Asisting attachment

Explanation

The given answer lists several consequences of having certain skin properties. Vulnerability to water in-flow means that the skin is prone to allowing water to enter. Modification to resist attack suggests that the skin has undergone changes to protect against harm. In danger of water loss implies that there is a risk of losing water. Assisting attachment indicates that the skin helps in attaching or sticking to surfaces.

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8.

Some platyhelminthes have primitive eyes called __

Correct Answer(s)
pigment cup ocelli

Explanation
Platyhelminthes, also known as flatworms, have primitive eyes called pigment cup ocelli. These eyes are simple in structure and consist of a pigment cup that contains light-sensitive cells. The pigment cup helps to focus light onto the light-sensitive cells, allowing the flatworm to detect changes in light intensity. While these eyes are not as complex as those found in higher organisms, they still allow the flatworm to perceive light and shadows in their environment.

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1

9.

Platyhelmithes larvae are:

Trochophore larvae
Planula larvae
Mullers larvae

Correct Answer

A. Mullers larvae

Explanation

Mullers larvae are the larvae of the phylum Platyhelmithes. They are named after the German zoologist Johannes Peter Müller. Mullers larvae are free-living and have a ciliated body. They are typically oval or elongated in shape and have a distinct head region. These larvae are found in various species of flatworms, including tapeworms and flukes. They undergo metamorphosis to develop into adult flatworms.

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1

10.

Concentration of sense organs creates a _ and needs a

Correct Answer
head brain
head cerebral ganglia
antero-posterior axis
head ganglion

Explanation
The concentration of sense organs in the head indicates that the head is the main sensory center of an organism. The brain, which is located in the head, is responsible for processing and interpreting sensory information. The term "head cerebral ganglia" refers to a cluster of nerve cells in the head that function as a primitive brain. The "antero-posterior axis" refers to the front-to-back orientation of the head, which is important for coordinating sensory input. "Head ganglion" refers to a collection of nerve cell bodies in the head that also play a role in sensory processing.

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3

Quiz Platyhelminthes

Which of these options is incorrect about the Platyhelminthe phylum?

Quiz Preview

Platyhelminthes demonstarte an increase in complexity over Cnidaria

Platyhelminthes often alternate between __ and reproduction, this is referred to as of _

Platyhelminthe phylum includes the classes____

Platyhelminthes are an example of_______

Platyhelmithes have a and skin.

The consequences of having such skin properties include:

Some platyhelminthes have primitive eyes called __

Platyhelmithes larvae are:

Concentration of sense organs creates a _ and needs a

Quiz Platyhelminthes

Which of these options is incorrect about the Platyhelminthe phylum?

Quiz Preview

Platyhelminthes demonstarte an increase in complexity over Cnidaria

Platyhelminthes often alternate between ______ and ______ reproduction, this is referred to as ______ of _____

Platyhelminthe phylum includes the classes____

Platyhelminthes are an example of_______

Platyhelmithes have a ____ and ____ skin.

The consequences of having such skin properties include:

Some platyhelminthes have primitive eyes called____ ____ ______

Platyhelmithes larvae are:

Concentration of sense organs creates a _____ and needs a ____

Platyhelminthes often alternate between __ and reproduction, this is referred to as of _

Platyhelmithes have a and skin.

Some platyhelminthes have primitive eyes called __

Concentration of sense organs creates a _ and needs a