ecology & bio environment geography section 2 MCQ Questions & Answers Detailed Explanation

Answer: (c)

The biosphere is the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, geosphere, hydrosphere, and atmosphere.

The biosphere is made up of the parts of Earth where life exists. It is the worldwide sum of all ecosystems.

Answer: (b)

Ecosystems contain essentially two kinds of commodities: matter (nutrients) and energy. Material nutrients cycle through the biotic and abiotic parts of the ecosystem, available for repeated use by the organisms in the ecosystem's community.

However, energy enters an ecosystem by being used to convert low-energy carbon dioxide into high-energy carbohydrate, then passes through one or more of the organisms of the community, and is then lost to the ecosystem.

Eventually, all of the energy that enters the ecosystem is lost in the form of heat.

Answer: (c)

The tropical and subtropical dry broadleaf forest biome, also known as tropical dry forest, is located at tropical and subtropical latitudes. Deciduous trees predominate in most of these forests, and during the drought, a leafless period occurs, which varies with species type.

Teak and Sal, along with mango, bamboo, and rosewood, belong to the moist deciduous forests which shed their leaves in the dry season.

Answer: (b)

Taiga is a biome characterized by coniferous forests consisting mostly of pines, spruces and larches. It is the world’s largest terrestrial biome.

Answer: (d)

An ecosystem is a community of living and nonliving things that work together. It includes soil, atmosphere, heat and light from the sun, water and living organisms.

Answer: (c)

Lions provide important ecological and cultural functions. As apex and keystone predator, lions help to regulate prey populations; they also will scavenge if the opportunity arises.

Culturally, the lion (and particularly the male with its highly distinctive mane) is one of the most widely recognized animal symbols in human culture and the lion plays a key role in save the pastures from being overgrazed.