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EMBRYONIC MEMBRANES -
Such animals are called amniota. Embronic membranes are of 4 types -
(i) Yolk sac -
It is formed below the embryo. It contains fluid (no yolk)
It is double layered, made up of outer mesoderm and inner endoderm. First organ to form R.B.C.
(ii) Amnion -
It encloses a fluid filled space amniotic cavity. It surrounds complete embryo.
The embryo is suspended in the amniotic cavity by an umbilical cord.
The main b.v. from the placenta reach the foetus through the umbilical cord.
Amniotic fluid is derived from the foetal kidneys & bladder i.e. it is foetal urine.
Amniocentosis is method to detect sex of foetus & chromosomal defects.
(iii) Allentoise -
A small sac., consists of endoderm inside & mesoderm outside. It is excretory in nature, stores nitrogenous waste.
(iv) Chorion -
It completely surrounds embryo, outerly made up of ectoderm & inner of mesoderm.
3. Which substance(s) crossed the dialysis membrane? Support your response with data-based evidence.
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A simple method used to identify areas of high conservation priority is the selection of countries according to highest species richness. Among the top 12 countries identified this
Unlike DNA binding domains and dimerization domains, no general structural motifs have since been identified in the activation domains of diverse transcription factors.
Pangenesis Theory (i) Charles Darwin propounded pangenesis theory. (ii) According to this theory every cell, of animal body produces many minute particles kn
what is the excretory system of a crab?
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Q. Can you explain Para-sternal View? Various congenital anamolies can be detected in this view are perimembranous VSD (transducer anbled towards right hip), doubly commit
Q. What is meant by the peripheral nervous system (PNS)? The peripheral nervous system comprehends the ganglia and nerves of the body.
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