Organisms and Populations — Class 12 Biology PYQs

Which one of the following is the interaction where one species produces chemicals which can kill or inhibit the other species ?
[Max Marks: 1 | Set: 57/2/3]

Diapause is a phenomenon found in :
[Max Marks: 1 | Sets: 57/2/2]

According to Allen's rule, mammals living in colder climates have :
[Max Marks: 1 | Sets: 57/1/2]

Which one of the following is the correct mathematical expression for calculating population density ?
[Max Marks: 1 | Sets: 57/2/1]

When one species is inhibited by the other through production and release of certain toxic substances, the interaction between the two is called :
[Max Marks: 1 | Sets: 57/1/1]

Which of the following interactions is beneficial to both species involved ?
[Max Marks: 1 | Sets: 57/1/3]

Select the correct statement from the following :
[Max Marks: 1 | Sets: 57/2/3]

If a new habitat is being colonised, one would expect to observe :
[Max Marks: 1 | Sets: 57/1/3]

A plant species that produces thousands of tiny wind dispersed seeds is showing :
[Max Marks: 1 | Sets: 57/1/1]

The phenomenon where an association between two species benefits both the species is called :
[Max Marks: 1 | Sets: 57/2/1]