ZOOLOGYTALKS POST - ZOOLOGYTALKS

SPECIES CONCEPTS (DIFFERENT SPECIES CONCEPTS)
The categorization and maintenance of species records is important for science and conservation. For identifying an individual species, typically scientists will first consider Biological Species Concept, then descent from common ancestry and genotypic and phenotypic cohesion. Species concepts are still subject to debate. [...READ FULL]
PATTERN OF FEEDING AND DIGESTION IN LOWER INVERTEBRATES
PATTERN OF FEEDING AND DIGESTION IN LOWER INVERTEBRATES :- Every organism needs energy to perform its basic metabolic function. This energy can be obtain from food and sun. As sun is a universal source of energy but only autotrophic organism can obtain energy from sun. [...READ FULL]
CROSSOPTERYGII :- STRUCTURE AND AFFINITIES
Crossopterygian, (subclass Crossopterygii), any member of a group of primitive, lobe-finned, bony fishes believed to have given rise to the amphibians and all other land vertebrates. [...READ FULL]
TERRESTRIAL ADAPTATIONS IN VERTEBRATES
The idea of adaptation maintains that organisms (animals and plants) are structurally and functionally designed for meeting the needs of life in the habitats in which they live. Thus, adaptations include adjustments by which an organism accommodates itself to its environment. These may occur by natural selection. [...READ FULL]
TRENDS IN EVOLUTION
Evolution is change in the heritable characteristics of biological population over successive generation. Molecular evolution is change in the sequence of molecule of cell. Evolutionary genetics is study where how change in genes leads to change. Molecular markers have ability to detect genetic variation. TRENDS IN EVOLUTION [...READ FULL]
AFFINITIES OF DIPNOI
With special features of their own, the Dipnoi combine characteristics in which they resemble different groups of fishes as well as Amphibia. AFFINITIES OF DIPNOI [...READ FULL]
PATTERN OF FEEDING AND DIGESTION IN HIGEHER INVERTEBRATES
PATTERN OF FEEDING AND DIGESTION IN HIGEHER INVERTEBRATES :- There are various mechanism for capturing and feeding over prey or food these are as follow Leeches generally feed over the fluid and soft tissue by piercing and then sucking from their host and simply absorbs the blood from the prey or host [...READ FULL]
LARVAL FORMS OF MOLLUSCA
LARVAL FORMS OF MOLLUSCA :- Molluscan life histories do not perfectly correspond with taxonomy, but in general it is true that the archaeogastropods and the bivalves begin life as a trochophore and rapidly pass on to a veliger. There are different types of molluscan larvae according to the importance of the pelegic phase and amount of planktonic food taken. G. Thorson (1950) recognised three ecological types of larvae in Mollusca. [...READ FULL]
ADVANCED NERVOUS SYSTEM IN ARTHROPODA
NERVOUS SYSTEM IN ARTHROPODA is as advance as in Annelida. There is dorsal brain again connected with nerve ring to ventrae nerve cord. The arthropod nervous system consists of a dorsal brain and a ventral, ganglionated longitudinal nerve cord (primitively paired) from which lateral nerves extend in each segment. [...READ FULL]
MOLECULAR ORGANTIZATION OF EUKARYOTIC CHROMOSOME AND STRUCTURE OF NUCLEOSOME PARTICLES
INTRODUCTION The large human chromosome of humans [...READ FULL]