The digestive tracts of termites contain several species of bacteria. These bacteria produce enzymes that digest cellulose and lignin, the principal components of wood. Which statement correctly describes the association between termites and bacteria?

Bacteria compete for food by harming termites.
Bacteria compete for food by harming termites.

Bacteria obtain food from termites while helping termites digest wood.
Bacteria obtain food from termites while helping termites digest wood.

Bacteria obtain food from termites while harming their digestive tracts.
Bacteria obtain food from termites while harming their digestive tracts.

Bacteria compete for food without harming or helping termites.

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

i think the answer is a.keratin is the pigment responsible for skin color.