Causes of extinction, Biology

Assignment Help:

CAUSES OF EXTINCTION -

1.       HUNTING -

  • Man started hunting wild animlas for food and safety trade and fun. It may be subsistence hunting, commercial hunting and sport hunting.
  • Now large scale killing has started for skin, fur, leather feathers, horn, ivory & meat etc.
  • Dodo (Raphus) of Moritius and chetah have recently disappeared due to excessive hunting.
  • Elephants & Rhinoceros are class to extinction due to hunting for ivory and horns.
  • Whales (blue whale) are about to extinct due to hunting for oil & whale bone.
  • Small musk deer is hunted for musk (used in perfumes).

2.       FOREST FIRES -

It is held that forest fires resulting from human activity or mistake have caused the elimination of many sps. of wild life.

3.       DISTRUCTION OF HABITATES -

Destruction of natural habitats causes the most serious threat to wild life.

Habitats are destroyed by many human activities due to development work, deforestation, pollution, cleanliness (vultures are about to extinct).

4.       PHYSICAL ALTERATION OF ENVIRONMENT -

Any physical change in the routes of the migratory birds or fishes adversely affects them.


Related Discussions:- Causes of extinction

Explain the chemotherapeautic rinses, Explain the Chemotherapeautic rinses ...

Explain the Chemotherapeautic rinses Chemotherapeautic rinses:  The use of  0.12  per cent chlorhexidine has been proven to be of therapeutic significance in maintaining period

Specific guidelines for maintaining records of patients, Specific Guideline...

Specific Guidelines Physician's orders Each order should have the date and time it was written.  Some way of indicating which orders have been carried out is nece

Define tracheal system in details., Define tracheal system in details. ...

Define tracheal system in details. Respiratory system found in insects and some spiders where air passes directly to the tissues through a series of tubules. Since oxygen tran

What is ribozymes , In at least single eukaryote, Tetrahymena, the ...

In at least single eukaryote, Tetrahymena, the pre-rRNA molecule holds an intron.  Erasing  of  the  intron  in running  processing  of  the  pre-rRNA  does  not require  the  assi

Protozoa, What are the disadvantages of protozoa

What are the disadvantages of protozoa

What is the average duration of each stage in hours, A biologist examines a...

A biologist examines a series of cells and counts 140 cells in interphase, 10 cells in metaphase, 4 cells in anaphase and 7 cells in telophase. if complete cell cycle requires 24 h

Mrna levels and rna species, You are working at a large, well funded resear...

You are working at a large, well funded research institute with the latest biochemical techniques available. The focus of your research is to find a specific mutation, or set of mu

Respiration in insect - cockroach, RESPIR A TIO N IN INSECT (COCKROACH) ...

RESPIR A TIO N IN INSECT (COCKROACH) - Respiration is direct. So metabolic rate is high. This system is related to each cell of the body so respiratory pigment is ab

Surgical significance of inferior alveolar nerve and artery, Surgical signi...

Surgical significance of Inferior alveolar nerve and artery In an excessively resorbed ridge, the mental foramen with its contents of mental nerve and vessels, can be found o

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd