Phylum Platyhelminthes, Class Trematoda

1.

There are approximately _______ species in clas Trematoda.

A.

1000
B.

4000
C.

8000

Correct Answer
C. 8000

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.

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2.

Commonly known as , trematodes are parasitic __.

Correct Answer
flukes, flatworms

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.

Trematodes feed on host's and ___.

Correct Answer
cells, fragments

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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4.

The digestive tract consists of a mouth, muscular ______, esophagus, and two _ eating ____.

Correct Answer
pharynx, blind, cecae

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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1

5.

Most flukes belong to the subclass __________.

Correct Answer
digenea

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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6.

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

A.

2, 3
B.

3,2
C.

2,2
D.

2,4

Correct Answer
C. 2,2

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.

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7.

Adult trematodes are ___ in the bloodstreams or digestive tracts of .

Correct Answer
endoparasites, vertebrates

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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8.

Examples of Trematodes would be ________.

Correct Answer
schistosomes

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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9.

Shitosomes are blood flukes that cause _____. The eggs block circulation in the .

Correct Answer
shistosomiasis, liver.

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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Phylum Platyhelminthes, Class Trematoda

There are approximately _______ species in clas Trematoda.

Commonly known as ______, trematodes are parasitic ________.

Trematodes feed on host's ____ and _______.

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

Most flukes belong to the subclass __________.

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

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

Examples of Trematodes would be ________.

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

Commonly known as , trematodes are parasitic __.

Trematodes feed on host's and ___.

The digestive tract consists of a mouth, muscular ______, esophagus, and two _ eating ____.

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

Adult trematodes are ___ in the bloodstreams or digestive tracts of .

Shitosomes are blood flukes that cause _____. The eggs block circulation in the .