D. Producer, packager, distributer, retailer
I hope this helped!
Quick answer: Food enters the human digestive system through the mouth before then moving through the pharynx, esophagus, stomach, intestines, rectum and anus.
The mechanisms of reproductive isolation prevent the reproduction of two individuals from different species. The prezygotic mechanisms disrupt the stages of reproduction before the forming of the zygote or prevent the mating at the start, and the postzygotic mechanisms affect the stages of reproduction after the forming of the zygote.
So, the first and the third example (the urchins and the grasshoppers) show the prezygotic mechanism, as the two individuals are not able to mate or form a zygote.
The second and the fourth example ( zonkey and the death of a zygote) show the working of the postzygotic mechanisms, as the zygote is formed, but it seems to be inviable, and the zonkeys are sterile, preventing the individual to reproduce.
The answer to this question is <span>Developmental Levels II and III
During developmental level 2 and 3, the routines and exercise SHOULD serve a certain purpose. The exercise doer should know beforehand what type of results that they wanted to achieve and structure the routines to achieve that specific goals (for example, if they wanted to focus on losing weight without gaining muscle, they should put more time in cardio)
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