Chromosome – Definition, Structure, Type, Functions

Chromosome is a long thread-like structure made up of DNA molecules with part or all of the genetic material of an organism. Overview on Chromosome The chromosomes (Gr. Chrom-color, soma-body) are important components of a cell. A few thread-like structures are found in the karyolymph of the nucleus. They were first named chromosomes by Waldeyer … Read more

Reptilia (Class)- Classification, Characteristics, Examples

Reptiles are the first land animal vertebrates belongs to animal kingdom. Characteristics Features of Reptilia Class Reptilia (L. Reptilia = creeping) includes animals that are cold-blooded (poikilothermal) and terrestrial or aquatic tetra-pods.  The body is covered with body epidermal scales or scutes. The skin is dry and glands are absent. Limbs are tetrapodous and pentadactyl, … Read more

Amphibia (Class) – Characteristics, Classification, Examples

Amphibians are cold-blooded tetrapod vertebrae belong to animal kingdom. General Characteristics of Amphibia The representative of Class- Amphibia well both on land and in water, i.e., are amphibious. They are cold-blooded (poikilothermal) vertebrates. Skin is smooth, scale-less, rich in glands that keep it moist. Autostylic jaw suspension. Skull articulates with the atlas by two occipital … Read more

Pisces (Fishes)- Characteristics, Classification, Examples

Pisces are marine animal that are truly jawed vertebrates.–> Definition In this article we have covered everything related to Pisces, from characteristics to examples. Let’s dive right into the characteristics features of Pisces. General Characteristics Features of Pisces Aquatic, either fresh water or marine, cold blooded vertebrates. The skin is covered with scales, dermal denticles … Read more

Phylum Echinodermata- Definition, Classification, Characteristics, Examples

Definition Echinoderms are the marine animals that are triploblastic deuterostomes. The larva is bilaterally symmetrical and the adult has modified pentamerous radial symmetry. The integument contains spines and dermal ossicles. They have peculiar locomotory organs, the tube feet and peculiar water vascular system. Some 5,500 living species are known. Brief History It was Jacob Klein … Read more

Protochordata- Characteristics, Classification, Example and More

Protochordates were the first formed chordates that are marine and are triploblastic, bilaterally symmetrical and have organ system level of organization. They also possess a true body cavity called coelom. Characteristics of Protochordata The members of Group-Protochordata (Gr. Protos = first, Chorda = cord) or, Arcania are primitive or lower chordates without a distinct head. … Read more