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Developmental Patterns - Metazoa
The metazoans or Animalia can be divided into two groups on the basis of body symmetry. The bilateral metazoans can be divided into two great assemblages: the Protostomia and the Deuterostomia.
Platyhelminthes, Molluscs, Annelida, Arthropods and a number of minor phyla are classified as Protostomes while Echinodennata, Chordata and at least two minor phyla are included in the deuterostomes. The features used to place animals in these groups are largely developmental.
Are mollusc metameric beings? Exclusively analyzing this feature could it be said that molluscs are evolutionarily proximal to nematodes or to annelids? In molluscs there is no
Like DNA RNA is a long polymer having of nucleotides joined by 3'5' phosphodiester bonds. Furthermore, there are some differences: ? The bases in RNA are adenine abbr
Explain the salient features biochemical origin of life.
Biochemistry : The chemistry of living organisms that covers all the chemical reactions occurring in our body.
Which of the following best describes why Okazaki fragments are not observed in PCR? A. DNA primase is used for the entire reaction therefore eliminating the production of Okaz
What is the physiological cause of the syndrome known as cretinism? Cretinism is caused by chronic deficiency of the thyroid hormones (T3 and T4) during childhood. The chronic
Infectious bursal disease (IBD) It is a highly contagious acute disease in young chicken up to 6 weeks of age causing high morbidity and low mortality. Bursa may atrophy at th
Coelom - Metazoa True coelom is a body cavity which arises within the embryonic mesoderm so that the cavity lies between the body wall (integument; ectoderm) and guts (endoder
Define the meaning of value - Soil Value refers to relative lightness or darkness of a colour and is a measure of the amount of light that reaches the eye under standard lighti
Q. What are some examples of interspecific competition? Instance of interspecific competition are the dispute among worms, vultures, flies and microorganisms for carrion and th
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