It can be because there are some parts around that arent getting water
If two organisms were locked in an antagonistic co-evolutionary relationship the one who's generation time is shorter. It is the relation between males and females where sexual morphology changes over the time to counteract the opposite sex traits to achieve the maximum reproductive success.
Co-evolution does not necessarily require the presence of antagonism. The characteristics within group of unrelated species may converge to allow individual species to exploit valuable resources or increase protection.
Co-evolution is a reciprocal evolutionary change in set of interesting populations over the time resulting from the interaction between those population.There are some examples of co-evolution such as herbivores and plants and the relation between herbivores species and the plants that they consume.
To learn more about the unrelated species here
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Answer:
option 2
Explanation:
sperm it produced in testicles BUT it's stored in the epididymis
Hydrogen bond. Although other ones are equally as important such as a dipole-induced dipole
