| If the wild relatives of our crop plants die out, we might lose the genes that could be used to breed new pest-resistant strains. |
| The biologist said the rare type of red squirrel was important because more genetically diverse species were less likely to die out. |
| The reason the large animals did not die out at the end of previous glaciations is because there were no previous glaciations. |
| However, due to climate changes and other pressures, many species began to die out. |
| This will be in the same way that species die out if they do not physically adapt to events and their environment. |
| When monasteries die out, the patriarch sells the property cheaply to pay his bills. |
