7 Characteristic Features of Chordate Animals
In common with arthropods and annelids, chordates and chordate animals are bilaterally symmetrical and metamerically segmented; they possess, however, certain distinctive features not found in…
Biology
Structural Significance of Sclerenchyma Cells
The structure and position of this tissue also indicate its primary strengthening functions, but it is clearly distinguishable from collenchyma. Two widely diverse forms of…
Structural Significance of Collenchyma Tissues
This is a simple tissue consisting of one type of cell only the structure and position of the cells indicate the primary supporting function. Collenchyma…
The History and Evolutionary Trends of Vascular Plants
The evolution of the fully-erect land habit in plants has been the result of a capacity for great variation in cell types to meet the…
Concise Description of the Physiology of Sponges
The Physiology of Sponges In describing the physiology of sponges, we shall first tak a look…
Morphological Description of Sponges
All sponges are aquatic, the majority living in the sea where they are found at all depths from the intertidal zone to the deepest abysses….
Reproduction and Survival Mechanism of Hydra Species
Hydra Species reproduce both asexually and sexually. Asexually reproduction is performed by a process known as budding. In favorable circumstances, the numbers will be multiplied…
The Adaptive Mechanism of Hydra to a Sedentary Lifestyle
Sedentary lifestyle of hydra: Many coelenterates are sedentary animals. A hydra is sedentary for the greater part of its life; it does not actively seek…
Concise Description of Nervous Coordination in Hydra
The nervous system of a hydra may be said to be the most primitive type. It consists of a double nerve net, one on each…
The Physiology and Reproduction of Sponges
All sponges feed holozoically. The flagella of the choanocytes beat inwards, creating inhalant currents through the ostioles. Small food particles of many types are ingested…