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nasty-shy [4]
3 years ago
14

Index fossils are fossils of organisms that ____.

Biology
2 answers:
dusya [7]3 years ago
7 0

Answer:

They were spread over a wide area, and lived over a short period of time

Explanation:

Index fossils are fossils that are used to date back geologically.

Deffense [45]3 years ago
6 0

Answer: Option (1)

Explanation: Index fossils are those fossils which were present only for a short period of time and had wide geographical distribution. This fossils plays an important role in the correlation of rocks i.e two same rocks appearing at two different places, as well as, it helps in the determination of the age of rock. For example, ammonites.

Thus, the correct answer is option (1).

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Zoological importance of trypanosoma<br>​
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At the West African Institute for Trypanosomiasis Research Field Station at Ugbobigha was 21·5 per cent.; this species is believed to be of major economic importance because its presence must prevent the keeping of cattle in large areas of potential grazing.

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Trypanosomiasis, both of humans and of livestock, is one of the most important factors restricting economic development in Africa today. The present paper outlines how this disease is limiting agricultural, veterinary and forestry development in the Sudan, Bechuanaland and West Africa.

The present tsetse-fly distribution is reviewed. Glossina palpalis and G. morsitans occur in the south Sudan and G. morsitans in the Ngamiland district of Bechuanaland; G. morsitans, G. palpalis and G. tachinoides are the most important species in West Africa.

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