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Why birds are beneficial to man 4 Aug 2013 | 11:01 pm
Biological control: Birds are of great use for man and his crops, as they control insect pests and other vermins. A large number of insect pests like potato bugs, Colorado beetles, chinch bugs, locust...
Function of Pectin in birds 31 Jul 2013 | 11:13 pm
Pectin is the most puzzling organ of the eye of a few reptiles and all birds (except kiwi). It is a highly vascular, pigmented, folded, and comb-like structure. It projects into the vitreous humour fr...
Whether Pigeon produces milk 28 Jul 2013 | 03:10 pm
The crop of both sexes of pigeons produces milk, called ‘pigeon’s milk’, during the breeding season. Internal epithelial lining of the crop is a little thickened in the form of two large patches. Thes...
Why birds have single ovary? 15 Jun 2013 | 09:36 am
Instead of having two ovaries, birds have single ovary. It is a very significant outcome of the evolution and adaptation as well. There are proper justifications behind this. The adult birds contain a...
Symptoms of Snake Bites and different types of venoms 8 Mar 2013 | 09:04 pm
The venom of different snakes has its own characteristic effect. The bitten person may die or recover depending upon the amount injected and its virulence. There are two types snake venoms – Neurotoxi...
Define various types of Oncogenic Viruses 5 Mar 2013 | 09:09 pm
Oncogenic virus is a virus which is capable of inducing the formation of tumors. This type of virus is also called a tumor virus. There are certain of oncogenic viruses which are described as follows:...
Polymorphism in human blood parasite Trypanosoma 22 Feb 2013 | 08:54 am
It is found in Central and West African countries (Nigeria, Congo etc.). It is a blood parasite of man and gut parasite of tse-tse flies. It is transmitted from man to man mainly by the blood sucking ...
Protozoan dinoflagellates are not eukaryotes and some may be poisonous 20 Feb 2013 | 08:24 pm
The name pyrrophyte (meaning “fire plant”) refers to the bio-luminescence of many dinoflagellates. Dinoflagellates (meaning “terrible whip bearer”) refers to the fact that some species are poisonous. ...
Distinguish between monogenetic and digenetic parasite 17 Feb 2013 | 08:49 pm
Parasite is an organism, animal or plant which depends for its survival on the other organism. The organism on which the parasite depends in called the host and the relationship between the two is cal...
short questions and answers on Gene Regulation 13 Feb 2013 | 06:55 pm
1. The lac regulatory protein is called a repressor. -because it keeps away RNA polymerase from transcribing the structural genes. 2. When lactose is present, the lac genes are expressed. -because al...
