In this article we will discuss about Neoteny:- 1. History of Neoteny 2. Types of Neoteny 3. Factors 4. Genetics 5. Significance. Contents: History of Neoteny Types of Neoteny Factors for Neoteny Genetics of Neoteny Significance of Neoteny 1. History of Neoteny: Since many years the size difference of the adult and larval phase of spotted salamander was noted. The [...]
The following points highlight the top six characteristics of amphibians. The characteristics are: 1. External Features 2. Internal Features 3. Fertilization 4. Development 5. Chromosome Number 6. Physiological Adaptive Features. Characteristic # 1. External Features: a. The amphibians are ectothermic vertebrates. b. Skin is naked, moist and highly glandular. c. Dermal scales are present in some members of apodans (e.g., [...]
In this article we will discuss about Reptiles:- 1. Definition and Origin of Reptiles 2. History of Reptiles 3. Characteristic Features 4. Classification. Definition and Origin of Reptiles: Reptiles may be defined as "cold-blooded vertebrates, breathe by lungs throughout their existence, and having the body covered with scales or scutes. A basioccipital bone is present in the skull which articulates [...]