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It arises from a one embryonic cell known as neuroblast
Types of neuron: According to number of process¬(a) Unipolar: Only axon is there. e.g. mesencephalic nucleus. (b) Pseudounipolar: Only axon is there but it gets seperate to form dendron also." e.g. sensory ganglia. (c) Non-polar: Only cyton is there. e.g. Hydra and other cnidarians. (d) Bipolar: One axon and one dendron is there. e.g. retinal and cochlear ganglia. (e) Multipolar: One axon and various dendrons are there. e.g. most of the neuron of the body.
Biological Adaptation These adaptations depend on the geology and basic fertility of the region and some of the mechanisms that are especially well developed in tropical rain
Storage Excretion Many insects exhibit a phenomenon known as storage excretion. If excretory products are stored in the body instead of being eliminated, no water is expended
Structure of human testis: The male reproductive system consists of a pair of testis. Testis are male reproductive organs and produce (male gametes) sperms and also secrete
The peppered moth experiment was an example of directional selection; due to environmental conditions the directional selection shifted from one extreme to the other in 1850s Engla
Q. What is hematosis? In humans where does hematosis occur? Hematosis is the oxygenation of the blood, venous blood (oxygen-poor) after hematosis is transformed into arterial b
What is the main theory opposed to evolution? The major theory that opposes the evolution theory on the explanation of how species emerged (phylogenesis) is fixism.
Products of Cleavage (Morula and blastula) In several cases, the blastomeres in early cleaving stages tend to presume spherical shape like that of the egg earlier than cleava
What is the typical vegetation of the grasslands? The Grasslands are mainly formed of herbaceous (nonwoody) vegetation: grass, small trees and bushes.
Explain about the Glycemic Index (GI)? In the previous sections, we have studied that some carbohydrates are rapidly digested and absorbed, some are digested slowly while some
Interactions between minerals Copper deficiency has been identified as a serious problem for grazing ruminants. A deficiency may be due to low concentrations of Cu in forage a
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