But because such inbreeding can be harmful, many plants have evolved mechanisms to avoid self-pollination.

Butterflies have evolved mechanisms to sequester these plant toxins and use them instead in their own defense.

Both plants and animals have evolved mechanisms allowing them to survive extremes.

We are a successful species inhabiting a radioactive world and must have evolved protective mechanisms to deal with the effects of natural radiation.

Some birds that stay active in winter have evolved elaborate mechanisms to generate or save heat.

Viruses have evolved mechanisms enabling them to easily infiltrate the nervous system.

But many other winter-active animals have evolved elaborate mechanisms to generate or save heat.

Grandmothers have evolved mechanisms that allow them to invest in their grandchildren.

Oral bacteria have evolved mechanisms to sense their environment and evade or modify the host.

Because of these outside barriers, philodendrons may not have had to evolve physical mechanisms to prevent cross-pollination.