Why is darwin's theory of evolution by natural selection not just a theory? '
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a. it does not rely on dependent variables, only independent variables.
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b. it has more evidence than a hypothesis, but less than a law.
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c. a hypothesis does not become a theory until it is already supported by evidence,
d. it is just a theory, it is equivalent to a guess.

The body is protected against harmful flu viruses by

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

The human genome project is devoted to mapping the general dna sequence of our species. this could lead to the development of new medicines, as well as the possibility of using gene therapy to treat certain diseases. however, there are some ethical issues surrounding the mapping of individual genomes. one concern is a) that your genes may change over time, making the project useless. b) that insurance companies could discriminate based on genetic make-up. c) that since this has never been done before, we should probably not do it now. d) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.