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Q. Show the Embryological Evidence?
Embryology is the study of the successive stages of sporogencsis , gametogenesis and the growth and development of the embryo. The number of nuclei in the pollen grains at the time of pollen dispersal is either two or three. Double fertilisation is an example of embryological unity throughout the angiosperms. Based on the number of cotyledons, monocotyledons are separated from dicotyledons. The binucleate pollen is derived. Embryology has had systematic significance in the grass family, where with several other characters it has been used to revise the family's classification. In animals the embryological evidence is of great significance, e.g. the Anopheles maculipennis complex is broken into a number of sibling species on the basis of their egg structure. In Dacus oleae and ceratitis capitata.(fruit flies) the whole eggs are separated on the basis of the character of anterior pole and the whole classification of white flies is primarily based on the structure of their pupae.
Feline leukemia The disease is caused by a retrovirus and is the most common naturally occurring lymphosarcoma and accounts for nearly 30% of feline tumors. Based on the location
CYTOCHEMISTR Y OF PROTOPLASM - It is supper mixture or mixture of mixtures . 3 4 elements present in it. 1 3 elements are universal. e.g. C, H, O, N, P, K, S,
Q Lower Oesophageal Sphincter? Competency of LES (Lower Oesophageal Sphincter) is important. The pressure of this sphincter is controlled by many factors, one of which is hormo
Subsequently many such fossils were known from France, Italy and middle East. All such fossils exhibited reduced brow ridges, steep forehead, high rounded cranial vault, short face
F a t cow syndrome Fat cow syndrome, also known as fatty infiltration of liver, is a highly fatal disease in high yielding dairy animals that occurs a few days before or afte
Benthos - Aquatic Ecosystem The benthos or the benthic organisms are those found living in or on the bottom or benthic region of the water mass. They exhibit a variety of adap
How to increase in sodium conductance A complete motor neuron is removed from a frog and placed in normal physiological saline at 1 AM. The neuron is healthy. At 2 AM, the ph
Cyclosis is a type of internal cell movement in which an oriented flow of circulating material is formed and maintained in the cytoplasm by the action of microfilaments. Cyclosis i
State the term Cercaria? A stage in the life cycle of trematode flukes. Cercaria develops from redia found in intermediate host. This tadpolelike organism is released from inte
Define Precaution for Separation of Amino Acids by Paper Chromatography? 1. Hold the paper with the extra strip kept at one side. Handling of whatman paper with hand should be
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