Why might anthropogenic global warming be dangerous?
What will be an ideal response?
Answer: Species would go extinct if they didn't evolve, but if things evolved to fast, they wouldn't be able to keep up
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Geographic biodiversity "hot spots"
A. have the highest vascular plant species richness and ?3 unique ecosystems. B. have ?1500 endemic plant species and have lost ?70% of the original habitat. C. have the greatest number of species that have lost >50% of their original range. D. contain ?1500 vascular plant species and have lost >50% of their original range.
The smallest cells in the domain Bacteria are:
A) viruses B) archaea C) mycoplasma D) cyanobacteria
What is the basis for incomplete dominance?
A) Both alleles of a gene produce weakly functioning proteins. B) One allele produces some functioning protein; the other allele is nonfunctional. C) One gene has many effects. D) An individual has more than two alleles for a gene. E) Crossing over has switched alleles for a gene on homologous chromosomes.
Even though 90 percent of infections are asymptomatic, why should you always treat amebiasis?
A) The protozoan can cause invasive disease that affects the liver, lungs, and brain. B) The immune system of the host can quickly become compromised. C) Exotoxin production can promote a vigorous inflammatory response in certain patients and also damage the cytoskeleton of the colon's epithelial cells. D) Asymptomatic patients can continue to spread the disease for years before dying themselves. E) Pseudomembranous plaques form along the colon lining as toxins cause tissue damage in 10 percent of hosts.