Which statement best describes macromolecules? Macromolecules are four categories of important biological molecules, each with its own basic components and functions.

Macromolecules are biological molecules with different functions, but they are built from the same basic components.

Macromolecules are the larger forms of certain biological molecules, where many of the basic components are connected.

Macromolecules are the four major categories of important molecules, one of which is biological molecules.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

substitution is the answer in this case

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.