Which human-induced event would cause a decrease in the population of another species?
a. salmon are eaten by the bears who are hunted.
b. the polar bear population is affected by seal hunters.
c. fungi decompose a diseased rosebush.
d. vultures feed off the bodies of birds killed by an oil spill.

Select the correct answer from each drop-down menu. in an experiment, dr. travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. the amount of calcium is variable. the risk of bone fractures .

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.

How do disease caused by bacteria and disease caused by viruses react to antibiotics?