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Theodosius Dobzhansky and Boris Spassky demonstrated the working of normalising selectioion a behavioural trait in two populations of Drosophida pseudobscura. The two populatiors were subject to artificial selection. One population was selected for positive phofobctic behaviour and the other negative phototactic behaviour Flies were placed in a container from where they could choose to go towards light or darkness. The photopositive flies or those that moved towards light were collected and bred, as also tljie ones which exhibited photonegative (movement away from light) behaviour. The brezding experiments were repeated for several generations and for each generation the artifical selection was maintained. At the end of several generations of artificial selection, it was observed that two distinct populations resulted, one increasingly photopositive and the other increasingly photonegative.
write two part each in the body where cuboidal epithelia tissue are found in absorption and excretion
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Describe the general examination of clinical examination? It is always to better to ask the patient to help himself/herself in setting on to the examination table and rename so
How to do Glucose test A glucose test is a type of blood test used to determine the amount of glucose in the blood. There are several different kinds of glucose tests: "
Explain how human activities can cause an imbalance in biogeochemical cycling and lead to problems such as cultural eutrophication and fish kills.
Explain the Transcription Factor of Zinc? Zinc is an important structural component of DNA- binding proteins also known as 'transcription factors'. These transcription factors
Q What is the fundamental structure of the HIV virus? What is the function of the glycoproteins of its envelope? HIV is an RNA virus in its core there are two strands of RNA an
Explain the Composition of MacConkey Agar? Bactopeptone - 17.0 gm Protease Peptone - 3.0 gm Lactose - 10.0 gm Bile salt mixture - 1.5 gm Sodium chloride - 5.0 gm
Explain Materials for Root End Filling- Amalgam a) Its radiopacity is the better than any other REF materials b) Greatest amount of leakage! c) Corrosion, and significant
What are the excretory organs in protozoa.
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