NEET Ecology and Environment 2

Question 1

What is the term for the sequential development of ecological communities over time in a previously barren area?

Accepted Answer

Primary succession

Answer

Primary succession occurs in lifeless areas (e.g., after volcanic eruption) where pioneer species like lichens first colonize bare rock.

Question 2

What is a biome?

Accepted Answer

A large geographic area characterized by its climate and dominant vegetation

Answer

A biome is a large-scale ecosystem defined by its climate and characteristic plant and animal communities, e.g., tropical rainforest or tundra.

Question 3

What is eutrophication?

Accepted Answer

Excessive nutrient enrichment of water bodies leading to algal blooms

Answer

Eutrophication occurs when excess nutrients (especially nitrogen and phosphorus) cause rapid algal growth, depleting dissolved oxygen and harming aquatic life.

Question 4

Which type of symbiosis benefits one organism while harming another?

Accepted Answer

Parasitism

Answer

Parasitism is a symbiotic relationship where one organism (parasite) benefits at the expense of another (host), such as tapeworms in humans.

Question 5

What is the primary cause of species extinction globally today?

Accepted Answer

Habitat loss and destruction

Answer

Habitat loss through deforestation, wetland drainage, and urban expansion is the leading cause of species extinction worldwide.

NEET - National Eligibility cum Entrance Test Practice Test

NEET - National Eligibility cum Entrance Test Practice Test

NEET Ecology and Environment 2