Large doses of antibiotics given to fight an infection are likely to destroy bacteria that produce vitamin k. in which digestive organ do we find such beneficial bacteria? a. stomach b. large intestine c. liver

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?