Ultimate Quiz On Ecdysozoa

2.

Check all phylums included in Ecdysozoa:

Chelicerates
Nematoda
Onychophora
Tardigrada
Cestodes
Annelida
Arthropoda
Coeloids
Nematomorphs
Liapulids
Priapulids
Kinorhynchs

Correct Answer(s)

A. Nematoda
A. Onychophora
A. Tardigrada
A. Arthropoda
A. Nematomorphs
A. Priapulids
A. Kinorhynchs

Explanation

The correct answer includes the phylums Nematoda, Onychophora, Tardigrada, Arthropoda, Nematomorphs, Priapulids, and Kinorhynchs. These phylums are all part of the Ecdysozoa group, which is characterized by organisms that undergo ecdysis or molting.

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1

3.

What are the main characteristics of Ecdysozoa?

External cilia
Ciliated larval forms
No ciliated larval forms
No external cilia
Cuticle
Coelom
Reduced coelom/haemocoel
Moulting

Correct Answer(s)

A. No ciliated larval forms
A. No external cilia
A. Cuticle
A. Reduced coelom/haemocoel
A. Moulting

Explanation

Ecdysozoa is a group of animals that share several main characteristics. Firstly, they do not have ciliated larval forms, meaning that their larvae do not possess cilia for movement. Additionally, they also lack external cilia in their adult forms. Another characteristic is the presence of a cuticle, which is a protective outer covering made of a tough, flexible material. Ecdysozoa also have a reduced coelom or haemocoel, which refers to the body cavity. Lastly, these animals undergo moulting, a process where they shed their old cuticle and grow a new one.

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4.

The ecdysozoan cuticle is made of __, a polymer of _ _

Correct Answer(s)
chitin N-acetylglucosamine

Explanation
The ecdysozoan cuticle is composed of chitin, which is a polymer made up of N-acetylglucosamine. Chitin is a tough, flexible substance that provides structural support and protection to the organisms possessing it. N-acetylglucosamine is a sugar molecule that forms the building blocks of chitin. Together, these components form the ecdysozoan cuticle, serving as a protective outer covering for various organisms within the ecdysozoan group.

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5.

Cuticle properties can be changed by_____

Layers
Additives
Sun exposure
Water exposure

Correct Answer

A. Additives

Explanation

Additives can change the properties of the cuticle. Cuticles are the outermost layer of an organism, such as the protective layer on plants or the outer layer of skin. Additives are substances that are added to a material to enhance or modify its properties. In the context of cuticles, additives could refer to substances like oils, waxes, or chemicals that are applied to the cuticle to alter its texture, appearance, or protective capabilities. By adding these additives, the cuticle's properties can be modified, providing benefits such as increased moisture retention, UV protection, or improved resistance to environmental factors.

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6.

Who adds minerals to increase what? (Example in lecture)

Crustacea add minerals to increase water proofing
Crustacea add minerals to increase hardness
Tardigrades add minerals to increase elasticity
Grasshoppers add alcohol to increase cocktails

Correct Answer

A. Crustacea add minerals to increase hardness

Explanation

Crustacea add minerals to increase hardness. This means that crustaceans, such as crabs and lobsters, incorporate minerals into their exoskeletons to make them stronger and more resistant to damage. By adding minerals, the crustaceans enhance the hardness of their exoskeletons, providing them with better protection and support. This adaptation allows them to thrive in their environment and helps them to avoid being easily crushed or broken.

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7.

The cuticle is secreted by the ______

Correct Answer
epidermis
ectodermis

Explanation
The correct answer is epidermis. The epidermis is the outermost layer of cells in the skin of plants and animals. It is responsible for producing the cuticle, a waxy layer that covers the outer surface of the plant or animal and helps to prevent water loss and protect against pathogens. The ectodermis, on the other hand, is a layer of cells found in the roots of plants that functions in the absorption of water and minerals. Therefore, the correct answer is epidermis.

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8.

Nematodes have low diversity but very high _ diversity.

Correct Answer
morphological physiological

Explanation
Nematodes have low morphological diversity but very high physiological diversity. This means that while they may have limited variation in their physical characteristics, such as body shape or size, they exhibit a wide range of physiological adaptations and functions. This diversity in physiological traits allows nematodes to occupy different ecological niches and adapt to various environmental conditions.

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9.

DNA _ _ has been invaluable in establishing Ecdysozoa.

Correct Answer
sequence data
sequencing data

Explanation
DNA sequence data and sequencing data have been invaluable in establishing Ecdysozoa. This is because the DNA sequence data provides information about the specific sequence of nucleotides in the DNA of different organisms, allowing scientists to compare and analyze the genetic similarities and differences between species. Sequencing data refers to the process of determining the order of nucleotides in a DNA molecule. By analyzing the DNA sequence data and sequencing data, scientists can identify common genetic traits and relationships between different species, helping to establish the evolutionary relationships within the Ecdysozoa group.

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10.

Which phylum shows coelomate ancestry most clearly?

Arthropoda
Nematoda
Onychophora
Tardigrada
Nematomorpha

Correct Answer

A. Onychophora

Explanation

Onychophora is the correct answer because it is a phylum that exhibits clear evidence of coelomate ancestry. Coelomates are organisms that have a true body cavity called a coelom, which is lined with mesoderm. Onychophora possess a well-developed coelom, which is a characteristic feature of coelomate organisms. This phylum also shares other characteristics with coelomates, such as a complete digestive system and a closed circulatory system. Therefore, Onychophora is the phylum that most clearly demonstrates coelomate ancestry.

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11.

Insects and nematodes have lost original and _ new systems.

Correct Answer
nephridia independently evolved
nephridia have evolved

Explanation
Insects and nematodes have lost their original excretory systems and independently evolved new systems called nephridia. This means that both insects and nematodes have developed their own separate excretory systems, which are called nephridia.

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12.

Small Ecdysozoa (such as tardigrades) are good at _____

Correct Answer
cryptobiosis

Explanation
Small Ecdysozoa, such as tardigrades, are good at cryptobiosis. Cryptobiosis is a state of suspended animation in which an organism's metabolic activities are almost completely halted. Tardigrades are known for their ability to enter cryptobiosis in response to extreme environmental conditions, such as desiccation or extreme temperatures. During cryptobiosis, tardigrades can survive without water for long periods of time and withstand extreme temperatures, radiation, and even the vacuum of space. This unique adaptation allows them to survive in harsh environments and resume their normal activities once favorable conditions return.

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Ultimate Quiz On Ecdysozoa

How many phylums are in Ecdysozoa?

Quiz Preview

Check all phylums included in Ecdysozoa:

What are the main characteristics of Ecdysozoa?

The ecdysozoan cuticle is made of __, a polymer of _ _

Cuticle properties can be changed by_____

Who adds minerals to increase what? (Example in lecture)

The cuticle is secreted by the ______

Nematodes have low diversity but very high _ diversity.

DNA _ _ has been invaluable in establishing Ecdysozoa.

Which phylum shows coelomate ancestry most clearly?

Insects and nematodes have lost original and _ new systems.

Small Ecdysozoa (such as tardigrades) are good at _____

Ultimate Quiz On Ecdysozoa

How many phylums are in Ecdysozoa?

Quiz Preview

Check all phylums included in Ecdysozoa:

What are the main characteristics of Ecdysozoa?

The ecdysozoan cuticle is made of ____, a polymer of ___ ______ _______

Cuticle properties can be changed by_____

Who adds minerals to increase what? (Example in lecture)

The cuticle is secreted by the ______

Nematodes have low ____ diversity but very high _____ diversity.

DNA _____ _____ has been invaluable in establishing Ecdysozoa.

Which phylum shows coelomate ancestry most clearly?

Insects and nematodes have lost original ____ and ____ _____ new systems.

Small Ecdysozoa (such as tardigrades) are good at _____

The ecdysozoan cuticle is made of __, a polymer of _ _

Nematodes have low diversity but very high _ diversity.

DNA _ _ has been invaluable in establishing Ecdysozoa.

Insects and nematodes have lost original and _ new systems.