As a notable example, selection for higher yield often comes at a cost of lower protein content per seed among cereal crops: domestic grains may exhibit only 50% of the protein content of those of their wild relatives (Doebley et al. 2006).
For example, selection on spawning date depends on at least three changes that are uncertain: (i) the advance in optimal emergence timing, (ii) a plastic change in spawning date owing to warmer waters, and (iii) potential costs of longer delays between migration and spawning.
The validated marker panels we have reported here will aid selection for high milk production under anticipated climate change scenarios, for example selection of sires whose daughters will be most productive at low levels of feeding.
In our course, we used the class period before this activity to illustrate these requirements with examples of selection at work.
Third, we presented students with multiple examples of selection at work in a variety of different contexts.
The literature is sufficiently rich that there is no reason that instruction cannot provide students with multiple examples of selection at work.
Warfarin is also a pesticide used to kill rats, and the history of this application provides a third example of natural selection at the DNA sequence level and an example of convergent evolution.
"They are super-specialized members of the bear family, a magnificent example of natural selection at work".
New research shows that children of these women have a survival advantage--a dramatic example of natural selection at work in humans.
A new study reveals a rare example of sexual selection at work: Its authors find that female jumping spiders' choosiness for ornamented and dancing mates drives the evolution of new spider species.
