Viruses regularly move between animals and humans. In rare but dangerous cases, a virus may undergo a genetic change that increases its risk of causing serious disease in human populations. Which of the following changes in human/animal interactions would be most likely to increase the risk of human harm due to virus exposure?A.Areas that are natural and untouched by humans have increased over the past few hundred years, decreasing the potential for human exposure to animal viruses.B.Humans now raise large numbers of animals for food.C.The diversity of animals around the world has been increasing rapidly due to human activity such as deforestation and agricultural land development.D.Humans now have more pets than they had historically.

Infectious disease of humans whose occurrence during the past two decades has substantially increased or threatens to increase in the near future relative to populations affected, geographic distribution, or magnitude of impacts is known as:Question 4Select one:a.Modern hazardb.Emerging and reemerging diseasec.Contemporary diseased.Antibiotic resistance

Which of the following applies to ecological diseases?Multiple choice question.They affect wildlife populations, such as bats and frogs.They occur naturally, and human intervention has little influence on them.While they affect wildlife, they have little effect on humans.

#8 Impossibly Immune5          Viruses, fungi, bacteria and other microscopic invaders have plagued humankind since the beginning of time, shortening our lifespans and often making our lives miserable. Yet it wasn't until the 1800s that we finally figured out that the tiniest of invaders, such as smallpox or HIV, are often the most dangerous of our biological enemies.6          Our immune systems, brimming with the weaponry of white blood cells, lay waste to infections and keep us alive ... at least for a while. People who suffer from immune system deficiencies struggle with all sorts of problems.7          That is the plight of zombies, too, because they have no immune systems to speak of. With their ample fleshiness, zombies are a perfect breeding ground for untold numbers of bacteria, fungi and viruses that would make short work of their hosts, devouring them from the inside out. And seeing as how they're zombies, that's probably a good thing.*1 pointPeople who suffer from immune system deficiencies struggle with all sorts of problems.The human immune system keeps us alive by laying waste to infection, bacteria, and diseases.Because zombies do not have an immune system, their bodies would be destroyed by bacteria and fungi.Viruses, fungi, bacteria and other microscopic pathogens have always posed a threat to zombies.

Researchers at Auburn University have put forth a new paper that suggests a global correlation between habitat loss and the emergence of infectious diseases. The team’s hypothesis is called the coevolution effect, and it attempts to explain why diseases are more likely to transfer from wildlife to humans in deforested habitats. The theory hinges on the idea that as human activity changes the landscape, the leftover “forest fragments" essentially become their own islands and disease-carrying microbes hosted there experience diversification, which paves the way for outbreaks of disease in humans.Which finding, if true, would most directly support the researchers’ hypothesis?Another team of researchers conducted a study that correlated the increase of microbes in a given area to the rise of various kinds of vegetation.eliminateA new human disease’s outbreak was traced back to an area surrounded by deforested land and many forest fragments.eliminateAn overall decrease in deforestation led to an overall increase in disease outbreaks in humans. eliminateWildlife activists have identified multiple possible reasons for the emergence of infectious diseases that do not relate to habitat loss.

The pathogenicity of a virus depends upon:(a) The immunity of the host body(b) The effective penetration of its genome(c) The overall environment inside the body(d) The overall environment outside the body