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What is Zoogeographical Realms? Types of Zoogeographical Realms 1. Palaearctic Realm 2. Nearctic Realm 3. Neo-tropical Realm 4. Ethiopian Realm 5. Oriental Realm 6. Australian Realm FAQ
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Continental Drift Theory Different Stages of Continental Drift Theory Different Forces Responsible for Continental Drift Note: It is important to mention that these factors were later found to be insufficient to fully explain continent drifting, which led to criticism of Wegener’s theory. Evidence Supporting Continental Drift Theory Evidence Supporting Continental Drift Theory: Criticisms of Continental … Read more
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What is Urochordata? Characteristics of Urochordata The following characteristics distinguish Urochordata from the other subphylums of Chordata: Larval Characteristics During the larval stage of Urochordata, known as the ascidian tadpole larva, several characteristic features can be observed. These features contribute to their chordate nature and play important roles in their development and behavior. These larval … Read more
15 min read 
Classification of Cephalochordata Kingdom Animalia Superphylum Deuterostomia Phylum Chordata Subphylum Cephalochordata Characteristics of Cephalochordate Morphology of Cephalochordate Feeding of Cephalochordate Systematic Resume The systematic resume of the subphylum Cephalochordata provides an overview of the classification and distribution of the two genera within the family Brachiostomatidae. The subphylum Cephalochordata consists of a single family known as … Read more
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Retrogressive Metamorphosis Retrogressive metamorphosis refers to a specific type of metamorphosis observed in ascidians or tunicates, which are a type of urochordate. Metamorphosis is a process in which an organism undergoes a profound change in form during post-embryonic development, typically transitioning from a larval stage to an adult stage. In retrogressive metamorphosis, the larva possesses … Read more
13 min read 
The origin of chordates, the early ancestors of vertebrates, is a subject that has fascinated zoologists for many years. While the exact details of their emergence remain elusive due to the absence of fossil remains, it is widely accepted that chordates evolved from invertebrates. The early chordate ancestors were soft-bodied organisms, leaving no tangible evidence … Read more
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Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Infraphylum: Agnatha General Characteristics of Class Agnatha The Class Agnatha encompasses the earliest known vertebrates and is distinguished by several key characteristics: Additional general characteristics of Class Agnatha include: Metabolism of Agnatha Morphology of Agnatha Reproduction of Agnatha Evolution of Agnatha Classification of Agnatha The Class Agnatha can be … Read more
29 min read 
Kingdom Animalia Phylum Chordata Subphylum Vertebrata Division Gnathostomata Superclass Pisces Class Chondrichthyes Characteristics of Chondrichthyes Chondrichthyes, also known as Sharks, Skates, and Rays, exhibit a range of fascinating characteristics. Here are some key features of these jawed fishes: These characteristics contribute to the unique adaptations and biological traits of Chondrichthyes, making them a diverse and … Read more
33 min read 
Kingdom Animalia Phylum Chordata Subphylum Vertebrata Division Gnathostomata Superclass Pisces Class Osteichthyes General Characteristics of Osteichthyes Osteichthyes, or bony fishes, exhibit a range of general characteristics that define this diverse class of vertebrates: These general characteristics contribute to the diversity and adaptability of bony fishes, allowing them to thrive in various aquatic habitats and play … Read more
1 revisions 45 min read 
Different Types Of Parental Care In Fishes Include 1. Deposition of Eggs Into Self-Made Nest Certain fish species exhibit the behavior of preparing nests to ensure the safe deposition and protection of their eggs, as well as the development of their young ones. The construction of these nests involves the participation of either males or … Read more