Phylum Platyhelminthes, Class Trematoda

1. Most flukes belong to the subclass __________.

Most flukes belong to the subclass Digenea. Digenea is a subclass of flatworms, specifically parasitic flukes. Flukes are a type of internal parasite that infects various animals, including humans. They have complex life cycles and are characterized by a leaf-like body shape. Digenea flukes have two suckers, one near the mouth and one on the ventral side, which they use to attach to their hosts. They are known for causing diseases such as schistosomiasis in humans.

Explanation

Most flukes belong to the subclass Digenea. Digenea is a subclass of flatworms, specifically parasitic flukes. Flukes are a type of internal parasite that infects various animals, including humans. They have complex life cycles and are characterized by a leaf-like body shape. Digenea flukes have two suckers, one near the mouth and one on the ventral side, which they use to attach to their hosts. They are known for causing diseases such as schistosomiasis in humans.

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2. Commonly known as ______, trematodes are parasitic ________.

Trematodes are commonly known as flukes, which are parasitic flatworms. Flukes are a type of flatworm that infect various animals, including humans, and typically have a leaf-like shape. They have a complex life cycle, involving multiple hosts, and can cause various diseases in their hosts.

Explanation

Trematodes are commonly known as flukes, which are parasitic flatworms. Flukes are a type of flatworm that infect various animals, including humans, and typically have a leaf-like shape. They have a complex life cycle, involving multiple hosts, and can cause various diseases in their hosts.

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3. Examples of Trematodes would be ________.

Trematodes are a type of parasitic flatworms that belong to the class Trematoda. Schistosomes are a specific group of trematodes that are known to cause diseases in humans, such as schistosomiasis. Therefore, schistosomes are examples of trematodes.

Explanation

Trematodes are a type of parasitic flatworms that belong to the class Trematoda. Schistosomes are a specific group of trematodes that are known to cause diseases in humans, such as schistosomiasis. Therefore, schistosomes are examples of trematodes.

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4. Life history consists of ___ different body forms, and at least ___ different hosts.

2, 3

3,2

2,2

2,4

Life history consists of two different body forms, which means that an organism goes through two distinct stages in its life cycle. Additionally, it involves two different hosts, indicating that the organism relies on two different species for its survival and reproduction.

Explanation

Life history consists of two different body forms, which means that an organism goes through two distinct stages in its life cycle. Additionally, it involves two different hosts, indicating that the organism relies on two different species for its survival and reproduction.

5. There are approximately _______ species in clas Trematoda.

1000

4000

8000

The correct answer is 8000 because the class Trematoda, also known as flukes, is a large class of parasitic flatworms. They are known to have a diverse range of species, with estimates ranging from 8000 to 24,000 species. Therefore, 8000 is a reasonable estimate for the number of species in class Trematoda.

Explanation

The correct answer is 8000 because the class Trematoda, also known as flukes, is a large class of parasitic flatworms. They are known to have a diverse range of species, with estimates ranging from 8000 to 24,000 species. Therefore, 8000 is a reasonable estimate for the number of species in class Trematoda.

6. The digestive tract consists of a mouth, muscular ________, esophagus, and two _____ eating ______.

The digestive tract consists of a mouth, muscular pharynx, esophagus, and two blind cecae. The pharynx is a muscular tube that helps in swallowing food, while the blind cecae are pouch-like structures that aid in digestion. Together, these structures play a crucial role in the process of digestion.

Explanation

The digestive tract consists of a mouth, muscular pharynx, esophagus, and two blind cecae. The pharynx is a muscular tube that helps in swallowing food, while the blind cecae are pouch-like structures that aid in digestion. Together, these structures play a crucial role in the process of digestion.

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7. Trematodes feed on host's ____ and _______.

Trematodes are parasitic flatworms that feed on the cells and fragments of their host. They attach themselves to the host's tissues and consume the cells, as well as any broken or damaged tissue fragments. This feeding behavior allows the trematodes to obtain nutrients and energy from their host, enabling their survival and reproduction.

Explanation

Trematodes are parasitic flatworms that feed on the cells and fragments of their host. They attach themselves to the host's tissues and consume the cells, as well as any broken or damaged tissue fragments. This feeding behavior allows the trematodes to obtain nutrients and energy from their host, enabling their survival and reproduction.

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8. Adult trematodes are ___________ in the bloodstreams or digestive tracts of ________.

Adult trematodes are endoparasites, which means they live inside the body of their host. They can be found in the bloodstreams or digestive tracts of vertebrates. These parasites rely on their hosts for survival and obtain nutrients from them. By living inside the host, they can easily access the resources they need for their own growth and reproduction.

Explanation

Adult trematodes are endoparasites, which means they live inside the body of their host. They can be found in the bloodstreams or digestive tracts of vertebrates. These parasites rely on their hosts for survival and obtain nutrients from them. By living inside the host, they can easily access the resources they need for their own growth and reproduction.

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9. Shitosomes are blood flukes that cause ___________. The eggs block circulation in the ______.

Shistosomiasis is caused by blood flukes known as shitosomes. These parasites release eggs that can block circulation in various organs, including the liver. This can lead to severe health issues and complications.

Explanation

Shistosomiasis is caused by blood flukes known as shitosomes. These parasites release eggs that can block circulation in various organs, including the liver. This can lead to severe health issues and complications.

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