In a hypothetical situation: a bacterium lives on the surface of a leaf, where it obtains nutrition from the leaf's nonliving, waxy covering (cuticle) while inhibiting the growth of plant pathogens. If this bacterium gains access to the inside of a leaf, however, it causes disease, harming the plant. If the plant dies, the bacterium and its offspring will decompose the plant. What is the correct sequence of ecological roles played by the bacterium in the situation described above? 1. Nutrient recycler 2. Mutualist 3. Host 4. Pathogenic parasite A. Sequence: 2, 3, 4 B. Sequence: 4, 2, 1 C. Sequence: 1, 2, 4 D. Sequence: 2, 4, 1

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

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not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.

answer >   yes we do, women; have three holes, urethral opening(pee hole, vagina, and the women pee/girls pee out of the urethra like the men do; only they have a single opening to pee/ejaculate.   (sorry if i'm too forward with this, but this is for a biology class, isn't it? )

hope that !         : )