What is the main cause for the extinction of some species in tropical forest?
Deforestation
Afforestation
Pollution
Soil erosion
A.
Deforestation
Deforestation is the depletion of forest resources. Its main cause is the explosion of human and livestock populationwith the increased demand of the basic needs.
The major cause of deforestation is the loss of wildlife, rare speies of flora and fauna.
Afforestation or reforestation is the only way to conserve our natural resources and the rare species of flora and fauna.
The species, which is going to become extinct due to lack of proper care would be called
rare
endangered
vulnerable
extinct
The plant that is characteristics component of mangrove vegetation
Rhizophora mangel
Ficus religiosa
Mangifera indica
Prosopis specigera
According to IUCN red list what is the status of red Panda (Athurus fulgens)?
Vulnerable species
Critically endangered species
Extinct species
Endangered species
Biological concept of species is mainly based on
reproductive isolation
morphological features only
methods of reproduction only
morphology and methods of reproduction
Species can be identified on the basis of
interbreed
species diversity
reproductive isolation
None of the above
One of the following statements is incorrect with reference to biodiversity. Identify it.
The areas with very few plant and animal species (low species richness) with no threatened species are called biodiversity hotspots.
Biodiversity increases from higher altitudes to lower altitudes
Biodiversity decreases from the equator to polar regions
Depletion in genetic diversity of crop plants is mainly due to the introduction of better varieties with high yield, disease resistance, etc.
Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example
enlargement of body size by swallowing air in puffer fish
melanism in moths
poison fangs in snakes
colour change in chameleon
