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Explain differance between Subphylum Chaetognatha and Subphylum Urochordata?
Subphylum Chaetognatha: Larval stages of this small group share some of the characteristics with Deuterostomes, but their relationship is not clear. However, these animals do possess the three typical chordate characteristics. The Chaetognaths include the marine arrow worms, which are small distinguished by their lancelet shape and body structure.
Subphylum Urochordata : This small group is known as the tunicates, or "sea squirts." They are characterized by the presence of a cellulose membrane covering that resembles a tunic. Sea squirts are sessile, or attached to marine substrates such as rocks. When stimulated, they shoot a stream of seawater, which gives them their name. Tunicates have chordate characteristics in their larval stages, and only pharyngeal gill slits are present in the adult forms.
Regulation of Respiration Whenever the need for oxygen in the body increases, ventilation of the respiratory organs also increases. In the same way whenever the level of oxyge
What is excretion? Excretion in Physiology is the method of elimination of metabolic wastes and other toxic substances from the body.
CHORIONI C VILLUS SAMPLING (CVS) - CVS is done during 8th-10th week of pregnancy when abortion is safe. For CVS cells are sucked into a catheter passed through the cervix.
The interior of the right atrium has a rough anterior part, the atrium proper and a smooth part called the sinus venarum. Also it has an appendage called the auricle. All the large
Explain the Physiology of Lactation? Lactogenesis is the onset of copious milk secretion around parturition, triggered by a fall in plasma progesterone levels. Although some co
To "express" a gene is to make it to function properly. A gene which encodes a protein will, when expressed, be transcribed or translated to produce that particular protein. A gene
who proposed trinomial nomenclature
Explain the Theory or Principle for Determination of Fungal and Yeast Count? Fungi are widespread and present on food, equipments and processing and storage facilities. These a
Q. What do you mean by syphilis? The Syphilis, as well known as lues, is a disease caused by the bacteria Treponema pallidum. Before the invention of penicillin, syphilis was a
How does temperature affect the action of enzymes upon their substrates? There are explained temperature ranges under which enzymes operate and there is a specific temperature
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