Tag: environmental equilibrium

Questions Related to environmental equilibrium

Select the correct statements with respect to migration in animals.
a. The same Siberian crane can be seen in Bharatpur in two consecutive winters.
b. Some fish lay eggs in rivers and the fingerlings gradually swim to sea.
c. Some fish migrate from cold climate to a warmer climate to escape cold weather.
d. Some butterflies migrate up to 10,000 kilometers to escape cold weather.
Which of the following alternative has the correct statements?

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. a and b

  2. b and c

  3. c and d

  4. a and d

Show answer
Correct Option: D
Explanation:

Migration of a particular species depends on the climatic conditions available for their survival. The harsh conditions decrease the biodiversity in a particular region while the favorable climatic conditions enrich the biodiversity of a particular region. 

The Siberian cranes used to arrive Bharatpur bird sanctuary, Rajasthan every year during winter time between the months of October to March/April. The Siberian cranes had made Bharatpur bird sanctuary their home for more than two centuries during the winter months to escape the harsh winter in their hometown in western Siberia and used to fly over 2,500 km to reach Rajasthan and other parts of India for warmer winters. The species has become endangered due to the fact that it is hunted on its destruction of wetlands. 
Some butterflies migrate in the south, central America, or they may even go to Mexico, to escape from the harsh and cold winter. In the spring they flutter back to their warm homes in the United States and Canada. One of these butterflies that migrate is Monarch. It is the winner of long distance. The Monarch can travel as far as 2000 miles, from Canada and the Northern States to California, Florida, and Mexico. The butterflies spend most of their winter time resting and saving up energy for their flight to return in the spring. 
Many types of fish migrate on a regular basis, on time scales ranging from daily to annual and over distances ranging from a few meters to thousands of kilometers. Fish usually migrate because of diet or reproductive needs and not to escape the cold weather.

Which endangered animal is the source of the world's finest, lightest warmest and most expensive wool the shahtoosh?

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. Nilgai

  2. Cheetal

  3. Kashmiri goat

  4. Chiru

Show answer
Correct Option: D
Explanation:

Chiru or the Tibetan antelope (Pantholops hodgsoni) is medium-sized bovid which is about 1.2 m in height. Its coat is grey to reddish brown, with a white underside. The Chiru’s wool, known as shahtoosh, is worm, soft and fine. Shahtoosh is very warmest, lightest and most expensive wool. The wool can only be obtained by killing the animal. It is listed as endangered by the world conservation union and the United States Fish and Wildlife Service due to commercial poaching for its wool. 

Therefore, the correct answer is option D.

Annual migration does not occur in case of

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. Arctic tern

  2. Salamander

  3. Salmon

  4. Siberian Crane

Show answer
Correct Option: B
Explanation:

Migration is used by a number of species, including birds, fish, invertebrates, and mammals, as one strategy for dealing with a seasonally variable environment. In many cases, migration is obligated, but in some species, within a migratory population, only some individuals migrate in a given season (migrants), while the rest remain in the same location (residents), a phenomenon called as partial migration. 

Partial migration can also occur when residents and migrants share a common ground but breed in separate locations. Another form of partial migration occurs when non-migrating individuals actually forgo reproduction this is essentially a special form of low-frequency reproduction. This type of partial migration is well documented in salamanders, newts, sea turtles, and many species of fish.