Discussion Topic Topic #1 Invasive or Alien Species Invasive or alien species have decimated natural ecosystems and cost us untold millions of dollars in environmental damage. Define what constitutes aninvasive oralien species. Why, in general, do invasive species pose such a serious problem for natural ecosystems? Selectone invasive species from the list […]

Not much more than 100 years ago, ordinary citizens were unaware of the role of microorganisms in the cause and spread of disease. In her book, “The Gospel of Germs”, Nancy Tomes describes the development of our collective cultural obsession with germs. To quote her book, “The rituals of germ […]

In peas, the genes a, b, c, d, e and f are linked on chromosome V and in the order given and the map distances are RF(a-b)=7 cM, RF(b-c) = 17 cM, RF(c-d) = 12 cM, RF (d-e) = 14 cM RF(e-f)= 10 cM. You cross a pure-breeding strain carrying […]

Q. Most biologists believe that immunes system’s defense against infections largely rests on its ability to distinguish self molecules from non-self molecules. This concept seems central to our understanding of immune function. Numerous immunologists have developed an alternative hypothesis: that the immune system’s effectiveness rests mostly on its ability to […]