Q.1.
The variety of ecosystems that are present in the biosphere.
Q.2.
The number of different species and the relative abundance of each species in a biological community.
Q.3.
Increases the chances that some species will survive during changing environmental conditions or during the outbreak of disease.
Q.4.
Removes calcium, potassium, and othernutrients from the soil, depriving plants of these nutrients.
Q.5.
Any resource replaced by natural processes more quickly than it is consumed is a:
Q.6.
Some scientists believe that we are in a period of mass extinction because a large percentage of all living species are being hit by comets everyday.
Q.7.
There is a gradual process of extinction of species known as background extinction.