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

What is angina pectoris, Q. What is Angina Pectoris? Chest discomfort i...

Q. What is Angina Pectoris? Chest discomfort is often reported by most patients especially those which are chronic cases of dyslipidemia and/or hypertension. Like diarrhoea and

Extra-embryonic membranes and placenta, Extra-Embryonic Membranes and Place...

Extra-Embryonic Membranes and Placenta The extra embryonic membranes like you already know provide nourishment and protection. These membranes are fundamentally similar to th

Female reproductive disorders-hydramnios, Hydrops amnii (Hydramnios) H...

Hydrops amnii (Hydramnios) Hydramnios is a rare condition. Excessive accumulation of amniotic fluid can be the result of foetal dysgenesis and agenesis. The increase of amniot

What is the difference between lungs and gills, Q. What is the difference b...

Q. What is the difference between lungs and gills? Lungs and Gills are richly vascularized organs that serve for gas exchange between the environment and the circulatory system

.excretion, name the blood vessel which bring waste product to kidney

name the blood vessel which bring waste product to kidney

Explain pediculosis and scabies, Pediculosis and scabies  Phthirus pubi...

Pediculosis and scabies  Phthirus pubis (pubic lice), which can be found on eyelashes, back, axillary and leg hairs as well as pubic areas, and Sarcoptes scabiei infestation (s

What is coevolution, What is Coevolution ? There is considerable eviden...

What is Coevolution ? There is considerable evidence that supports an interesting theory that two individual species can affect each others evolution in reciprocal fashion. In

Hydrophily - cross-pollination, Hydrophily - Cross-pollination All hyd...

Hydrophily - Cross-pollination All hydrophytes are not necessarily pollinated by water. In fact most of the aquatic plant are anemophilous, e.g. Alisma, Nymphaea. Like anemoph

Chemical stress - atmospheric imbalances, Chemical Stress - Atmospheric imb...

Chemical Stress - Atmospheric imbalances At least two components of the environment, oxygen and carbon dioxide that plants require are predominantly in the gaseous form. As yo

Define spiral cleavage in brief., Define Spiral cleavage in brief. Patt...

Define Spiral cleavage in brief. Pattern of cell division in the developing embryo where products of the cell divisions shift by rotating either counterclockwise or clockwise s

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