Zoology

Zoology is the branch of biology in which we study animals

SUBJECTIVE QUESTIONS IN AMPHIBIANS

SUBJECTIVE QUESTIONS IN AMPHIBIANS Describe phylogenetic relationships of amphibians. How did amnoites and anamniotes lineages evolve? Write note on Salamanders. Write a brief not of  ceacilians. Write note on Anurans. Write a brief not on adaptation in skin of amphibians. Discuss evolutions of axial

Circulation Immunity & Gas Exchange

Answer of Question of Circulation Immunity & Gas Exchange Q. 26. What are the five types of respiratory surfaces animals use for external i   respiration? An s. Protists and animals have the following main types of respiratory surfaces: i) Simple diffusion across plasma membranes

FURTHER PHYLOGENETIC CONSIDERATIONS IN AMPHIBIANS

FURTHER PHYLOGENETIC CONSIDERATIONS IN AMPHIBIANS There is a problem in amphibian phylogeny. This problem is the relationship among the three orders of modern amphibians. There are two hypotheses about the origin of amphihians: Monophyletic lineage Some zoologists place anurans, urodeles . and caecilians into

AMPHIBIANS IN PERIL

AMPHIBIANS IN PERIL Frogs and salandam are disappearing rapidly. We do not know the exact reasons of their disappearance. Some reasons are: 1. Local factors: Some local factors influence the amphibian populations. These factors are cutting of forests. It allows sunlight to reach at

EVOLUTIONARY PRESSURES IN AMPHIBIANS

EVOLUTIONARY PRESSURES IN AMPHIBIANS The lives of the most amphibians is divided into freshwater and land. Thus they show adaptations to both environments. The amphibians are supported by the buoyant of the water. They exchange gases with the water. They face the same osmoregulatory

SURVEY OF AMPHIBIANS

SURVEY OF AMPHIBIANS Amphibians occur on all continents except Antarctica. There are three orders of amphibians: Caudata, (salamanders), Anura, ( frogs and toads) and Gymnophiona (caecilians). ORDER CAUDATA (cauda, tail + Or. ara,  to bear) The characteristics are: 1. They possess a tail throughout

Amphibians Evolution

AMPHIBIANS EVOLUTIONARY PERSPECTIVE (amphibia, living a double life) Class Amphibia includes frogs. roads, salamanders and caecilians. Class name shows that amphibians move between water and land. They spend one stage or their life in water and another on land. Amphibians are tetrapods. Term tetrapod