Adivergent plate boundary is a boundary at which two tectonic plates move away from each other. as the plates move apart, magma rises upward between them and erupts onto the ocean floor as lava. this lava cools quickly to form solid rock. over time, these hardened lava flows build up on top of each other and are uplifted by tectonic forces to form mid-ocean ridges. based on this information, what type of rock are mid-ocean ridges made of? metamorphic rock sedimentary rock igneous rock eroded rock

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.