Which of these best demonstrates mutualism between certain types of bacteria and humans? 1.Intestinal bacteria obtain nutrients from the gut and produce vitamin K used by humans.

2.Bacteria become resistant to antibacterial medication that humans use for treatment.

3,Invasive bacteria at an area of injury produce toxins that damage healthy tissues of the human body.

4.Bacteria in improperly prepared food is consumed by humans, causing food poisoning.

Listed in the item bank are some key terms and expressions associated with the categories seen in the venn diagram. to find out more information about items, some have more details available when you click on them. drag and drop each item onto the proper area of the diagram. if an item describes more than one category, be sure to place it in the overlapping space. viruses are tiny infectious pathogens that cause many different diseases, such as polio, and the flu. though they are similar to one celled organisms in some ways, in many ways they are very different. use the venn diagram below to show the similarities and differences between viruses and living organisms.

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

Which is not a likely outcome after extensive irrigation of dry farmland? useless, unproductive soil salinization of the soil depletion of groundwater nutrient-rich soil