On a hike along the desert slope of the Sierra Nevada Mountains in California, you notice that there is an abundance of pinyon pine and juniper trees. We would identify these two plants as:
A) mutualistic species. B) symbiotic species.
C) ecological dominants. D) competitors.
Answer: C
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Answer the following statements true (T) or false (F)
1) If the p value corresponding to a given ?2 value and number of degrees of freedom is lower than 0.05, then the null hypothesis is rejected and it can be said with some confidence that the two genes being evaluated are linked. 2) Genes that are not syntenic are not linked. 3) The genetic distance from one end of a linkage group and the other may exceed 50 m.u. because the distances between many gene pairs are added together to make the map. 4) Sectors with a different phenotype in an otherwise uniform yeast colony may be evidence of mitotic recombination. 5) Large sectors suggest a mitotic recombination event late in the growth of a yeast colony. 6) A coefficient of coincidence of 0.5 in a region of three genes means that half as many double crossovers were observed as would have been expected if crossovers in the two intervals were independent.
What does it mean if the reported confidence interval for a population mean is 95%?
A) There is a 5% chance that the results are statistically significant. B) There is a 95% chance that the results are statistically significant. C) There is a 5% probability that the true mean is in the reported range. D) There is a 95% probability that the true mean is in the reported range.
If a dehydrated seed must re-imbibe water in order to germinate, what is the advantage of drying out to begin with?
A. Lighter in weight to facilitate dispersal B. Ensures germination only when conditions are good C. Protects seeds from freezing to death D. To improve transfer of material from
The ability of certain bacterial cells to take on different cell shapes is known as
A) meiosis. B) pleomorphic. C) pallidic. D) pyloric. E) fission.