Element are building blocks of matter that combine chemically to form countless compounds. which of the following are example of elements?
a acid, base and salt
b silicon, iron, and aluminum
c water, methane, and glucose
d proton, neutron and electron

What do all macromolecules have in common with each other? oa. they all are formed from the same elements.ob. they all have major roles in cell membranesoc. they all act as catalysts in the body.od. they all have peptide bonds between carbon atoms.

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.

What is one way intensive agriculture can contribute to climate change? a. tree loss to agriculture increases earth's albedo b. livestock manure absorbs greenhouse gases c. large herds of livestock release greenhouse gases d. fewer trees are available to replenish petroleum stores appex