Tag: evs

Questions Related to evs

Presence of higher diversity at the junction of territories of two different habitats is called  

evs interdependence in our environment meaning of environment significance of biodiversity habitat and adaptation

  1. Bottle neck effect

  2. Edge effect

  3. Junction effect

  4. Pasteur effect

Show answer
Correct Option: B
Explanation:

The edge effect is an ecological concept that describes how there is a greater diversity of life in the region where the edges two adjacent ecosystems overlap, such as land/water, or forest/grassland.

So the correct answer is 'Edge effect'.

Land occupied for human habitation in India is

evs interdependence in our environment meaning of environment significance of biodiversity habitat and adaptation

  1. 8%

  2. 6%

  3. 4.5%

  4. 3.6%

Show answer
Correct Option: A
Explanation:
One-fourth of earth's area is land which is covered by forests, agricultural farms and the urban and rural habitats of man. Out of total land area on earth, 52% of land is covered by forests, 20 % is occupied by deserts, 11% is occupied by agricultural farms and 2.6% is occupied by human settlements.
In India, out of total land surface, human habitation occupies 8% land, agricultural farms occupy 43% and forests occupy 23% of the total land.
So, the correct answer is '8%'.

Which term describes the mailing address where an organism lives?

evs interdependence in our environment meaning of environment significance of biodiversity habitat and adaptation

  1. Competitive exclusion

  2. Habitat

  3. Niche

  4. Mimicry

Show answer
Correct Option: B
Explanation:
A habitat is the type of natural environment in which a particular species of organism lives and is characterized by both physical and biological features. A 'species' habitat are those places where a particular species can find food, shelter, protection and mates for reproduction. Every organism has certain habitat needs for the conditions in which it will thrive, but some are tolerant of wide variations while others are very specific in their requirements. A habitat is not necessarily a geographical area, it can be the interior of a stem, a rotten log, a rock or a clump of moss, and for a parasitic organism it is the body of its host, etc.
So the correct option is 'habitat'.

State whether the following statements are true or false.
All the physiological requirements and activities of a species in its normal surroundings make up its habitat  

evs interdependence in our environment meaning of environment significance of biodiversity habitat and adaptation

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

An organisms niche and not the habitat describes its location, requirements and work within a particular community or ecosystem. If two species occupy the same niche they will generally compete with one another until one is displaced.

So, the correct option is 'False'.

State whether the following statements are true or false.
Pheromones are chemical substances, meant for. communication and coordination of organs in an individual.

evs interdependence in our environment meaning of environment significance of biodiversity habitat and adaptation

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

A pheromone is a secreted or excreted chemical factor that triggers a social response in members of the same species meant for communication and coordination. Pheromones are chemicals capable of acting outside the body of the secreting individual to impact the behavior of the receiving individual.

So, the correct option is 'True'.

Statement 1 : Cow in India and Kangaroo in Australia (boot herbivores) are ecological equivalents. 
Statements 2 : The organisms having similar niche in different geographical regions are known as ecological equivalents. 

evs interdependence in our environment meaning of environment significance of biodiversity habitat and adaptation

  1. Both statements 1 and 2 are correct

  2. Statement 1 is correct but statement 2 is incorrect

  3. Statement 1 is incorrect but statement 2 is correct

  4. Both statements 1 and 2 are incorrect

Show answer
Correct Option: A
Explanation:

Ecological equivalents are the organisms that occupy same niche iin different habitats (or geographical areas) e.g. both one and cat feed on shews and mice, they occupy the same niche through their habitats are different. 

Lichens and Mosses are the charateristic vegetation of

evs interdependence in our environment meaning of environment significance of biodiversity habitat and adaptation

  1. Tundra region

  2. Temperate region

  3. Mediterranean region

  4. Hot desert region

Show answer
Correct Option: A
Explanation:

Tundras are among Earth's coldest, harshest biomes. Tundra ecosystems are treeless regions found in the Arctic and on the tops of mountains, where the climate is cold and windy and rainfall is scant. So, the correct option is "Tundra region".

 Seasonal variations on Earth occur due to its 

evs interdependence in our environment meaning of environment significance of biodiversity habitat and adaptation

  1. tilted axis

  2. rotation around its own axis

  3. revolution around sun

  4. both (a) and (c)

Show answer
Correct Option: D
Explanation:

The revolution of our planet around the Sun and the tilt of axis cause annual variations in the intensity and duration of temperature, resulting in distinct seasons. These variations together with annual variation in precipitation account for the formation of major biomes such as desert, rain forest, and tundra. 

So the correct option is 'both (a), and (c)'.

Organism adapt to their habitat by which of the following means?

evs interdependence in our environment meaning of environment significance of biodiversity habitat and adaptation

  1. Changes in body

  2. Changes in behaviour

  3. Changes in location

  4. All of the above

Show answer
Correct Option: D
Explanation:

Every organism has its own ecosystem where it can survive but need to adapt to changes of habitat for survival.

Structural: Arctic foxes have small ears to retain body heat while desert foxes have large ears for heat radiation.
Physiological: These does not appear externally but based on metabolism it varies. Desert animals have more efficient kidneys and presence of toxins in the leaf to repel herbivores.
Behavioral: Desert animals are active at night during hot summer weather. Lizards seek a sunny spot in the morning to warm up to operating temperatures more quickly.
So the correct answer is 'All of the above'.

Select odd one out w.r.t Australian marsupials.

evs interdependence in our environment meaning of environment significance of biodiversity habitat and adaptation

  1. Bobcat

  2. Wombat

  3. Bandicoot

  4. Spotted cuscus

Show answer
Correct Option: A
Explanation:

Bobcat is originated from North America whereas Wombat, Bandicoot, Spotted cuscus.

So, the correct option is 'Bobcat'.