Active transport refers to a substance moving from areas in which it has low concentration to an area with high concentration, one example i guess is endocytosis, "<span>the taking in of matter by a living cell by invagination of its membrane to form a vacuole"</span>
The prey animals will become more and more then eat all of the food then starving the others killing off the species
DNA fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal investigation. ... Conversely, if the two DNA profiles do not match, then the evidence cannot have come from the suspect. DNA fingerprinting is also used to establish paternity.
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Finally, preexisting immunity to vaccinia virus, one of the main disadvantages of recombinant-viral vaccines, can be overcome by mucosal vaccination with vaccinia vectors due to compartmentalization of systemic and mucosal immune systems