7. which of the following can affect the activity of enzymes?

a. activation energy, reactants, and ph

b. proteins, regulatory molecules, and ph

c. temperature, ph, and regulatory molecules

d. temperature, lipids, and activation energy

8. which statement best explains why compounds have different properties than the elements that form them? complete this statement: when elements form a compound…

a. …the bonds and structure of the elements change

b. …the masses of the elements increase

c. …the masses of the elements decrease

d. …the elements become neutral

on number 7 the answer is not d

on number 8 the answer is not d

because i have a modified test
who ever answers both will get brainest

One of the largest seafood exporters to the united states is a. china b. brazil c. mexico d. saudi arabia

Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas