Animal Kingdom Quiz On Phylum Chordata

A frog would be classified under the class "Amphibians" because amphibians are a group of cold-blooded vertebrates that live both on land and in water. Frogs, along with other animals like salamanders and newts, belong to this class. They have unique characteristics such as moist skin, webbed feet, and the ability to undergo metamorphosis from tadpole to adult. Therefore, "Amphibians" is the correct class for a frog.

The correct answer is Aves. Birds belong to the class Aves, which is a group of warm-blooded vertebrates characterized by feathers, beaks, and the ability to lay eggs. They are distinct from reptiles and amphibians, as well as other classes of animals.

The class Agnatha consists of jawless fish. Lampreys are a type of jawless fish and belong to the class Agnatha. They are known for their round, eel-like bodies and sucker-like mouths. Lampreys are often parasitic, attaching themselves to other fish and sucking their blood. Therefore, lamprey is the correct answer as it is an example of an animal from the class Agnatha.

Osteo - bone (Boney Fish)

Agnatha is the correct answer because it is the class of jawless fish. Agnatha includes fish such as lampreys and hagfish, which lack true jaws and have a cartilaginous skeleton. This class is characterized by their cylindrical bodies, lack of paired fins, and their ability to attach to other fish and feed on their blood or bodily fluids. Agnatha is one of the major classes of vertebrates within the phylum Chordata, which also includes other classes such as Chondrichthyes and Osteichthyes.

Chondrichthyes, which includes sharks, rays, and skates, have tooth-like scales called dermal denticles. They are ectothermic, meaning their body temperature is regulated by the environment. Additionally, Chondrichthyes exhibit internal fertilization, where the male transfers sperm directly into the female's body. Therefore, all of the given options - tooth-like scales, ectothermy, and internal fertilization - are features of Chondrichthyes.

The given properties, such as dry scaly skin, ectothermic nature, 2 pairs of legs, lungs, internal fertilization, rubbery eggs with an amniotic shell, and a 3.5 chambered heart, are all characteristic of reptiles. Reptiles are known for their scaly skin, their reliance on external heat sources to regulate their body temperature, and their unique reproductive traits, such as internal fertilization and amniotic eggs. Additionally, reptiles typically have limbs with 2 pairs of legs and possess lungs for respiration. The presence of a 3.5 chambered heart is also a defining characteristic of reptiles. Therefore, the correct answer is Reptiles.

Sea Urchin is not an example of an animal from the Class Chondrichthyes because Chondrichthyes is a class of fish that includes sharks, rays, and skates, which are all cartilaginous fish. Sea Urchins, on the other hand, belong to the class Echinoidea and are not fish. They are marine animals with a spherical body covered in spines and are related to sea stars and sea cucumbers.

Birds are warm-blooded animals, meaning they can maintain a constant body temperature regardless of the external environment. Reptiles, insects, and fish are cold-blooded animals, meaning their body temperature fluctuates with the surrounding environment.

 An exoskeleton made of chitin is a characteristic of arthropods, not chordates. Chordates have an internal skeleton made of bone or cartilage. The other options are defining characteristics of chordates, including the presence of a notochord (a flexible rod that supports the body), a dorsal, hollow nerve cord (develops into the brain and spinal cord), and pharyngeal slits (openings in the throat region).

The Class Agnatha is a class of jawless fish, which includes hagfish and lampreys. These organisms are characterized by several features, such as being ectothermic (cold-blooded), having no paired limbs, possessing gills, and undergoing external fertilization. However, they do not have scales, which is the distinguishing feature of the Class Agnatha.