We can do our best to help them have interesting lives, have some independence from us, and have opportunities to engage in the behaviors for which they have evolved and which they still "need" to perform.
Crab spiders, phymatid bugs, and some praying mantids use flowers as places to wait for prey: they have evolved a camouflage that allows them to hide from the pollinating insects they feed on.
Domesticated animals are easy prey for wolves, as they have evolved under constant human protection, and are thus unable to defend themselves very well.
Despite the fact that animals that present this strategy do not actively search for their food, they have evolved several tactics that can increase their chances of capturing incoming prey.
Although these systems were developed for entertainment purposes, they have evolved as a means to encourage fitness exercise (termed exergames) in the general population.
Having lived alongside us for thousands of years, they have evolved not only an inbuilt affection for mankind but also a set of skills for becoming our "best friends" – even though they have little understanding of how we feel about them.
However, while vegetative organs such as leaves are the majority of harvestable biomass and would be ideal for accumulation of lipids, they have evolved as "source" tissues that are highly specialized for carbohydrate synthesis and export and do not have a propensity to accumulate lipid.
"We believe this kind of environment is not suitable for domestic cats because they have evolved as solitary animals and generally do not choose to live in social groups - unlike dogs which are a social species". But Ms Pears said the 12 cats - which were donated by people who were moving abroad and could not take the animals with them - were so far not showing any signs of stress.
The use of chicken frameworks may be advantageous for this purpose since they have evolved to function at a body temperature approximately 5°C higher than that of humans.
It is not surprising given that viruses are also dependent on cell survival for productive replication that they have evolved elegant mechanisms to inhibit infection-induced cell death (Roulston et al., 1999).
