The lymph is moved through the body in its own vessels making a one-way journey from the interstitial spaces to the subclavian veins at the base of the neck. Since the lymphatic system does not have a heart to pump it, its upward movement depends on the motions of the muscle and joint pumps.
Bee colonies are currently weaker than ever, making bees unable to carry pollin. The carrying capacity of the bees are <em>decreasing</em> because the population of bees are also decreasing.
A mutation can cause the organism to look different and function differently also.
Change one thing about the tests multiple times I'm guessing
