The two most popular hypotheses today are about "Cryptic Female Choice" (wherein the male genitalia are thought to be courtship devices) and "Sexually Antagonistic Coevolution" (wherein the male genitalia and female genitalia are constantly coevolving to counteract the opposite sex in an evolutionary "arms race"; p. 49).
A proportion of the miRNAs that were upregulated by metformin in the lung of smoke-free mice were also upregulated in the lung of MCS-exposed mice thereby counteracting an opposite effect triggered by MCS.
Within a sex, however, seasonal differences in eye size were achieved by changes in facet number, despite being counteracted by opposite changes in facet size, i.e., the larger wet-season eyes had more facets, which outweighed the effects of also having smaller facets.
Meanwhile, public-health strategists who want to counteract obesity face the opposite problem.
The latter finding is of interest in light of the fact that H-Ras and R-Ras have been reported to play opposite and counteracting roles in integrin-mediated adhesion in some cell types.
Any variation of current across the sensing resistor is thus counteracted by an opposite-direction variation of the high voltage applied to the nanospray emitter.
Be aware of your opponent's movements and weapons - if you can, learn how to sneak up and surprise them without being seen and take opposite weapons to counteract theirs, such as a battle rifle to attack if they have a shotgun.
Changes in membrane lipids were observed for this species; however, these were opposite to what would counteract the effects of cold.
Here, the idea is substantiated that the main advantage of sex is the opposite: the ability to counteract not only extinction but further evolution as well.
Here I am going to substantiate the heretical idea that the main advantage of sexual reproduction is the opposite: the ability to counteract evolution.
