Scientific Models Always Require memorization
Have limitations**
Are complete
Represent Old Information
(The answer is Have Limitations) I hope this helps.

the sun d the answer is sun

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.