1. during the lesson, you analyzed the dna sequence of the housefly. for which of the following organisms would you expect the dna sequence to be least similar to the housefly’s? (1 point).
butterfly. grasshopper. monkey. beetle.
2. why is pcr a necessary step in the analysis of a dna sample taken from a crime scene? (1 point).
the sample yields very little dna,
which means that it must be amplified to produce enough quantity to detect on a gel..
the sample may be contaminated,
which means that the dna of intere

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.