Ana studied a diagram of the geologic timeline to complete her homework assignment She became curious about the different divisions that formed the sections of an era. What is the name for the groups into which eras are divided?
Mesozoic Era
Triassic
Jurassic
Cretaceous
Began
(Millions of
years ago)
252
201
145
Duration
(Millions of
years ago)
51
56
79
sections
B. periods
o o o o
C. divisions
D
Precambrian

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

  the mississippians were considered to be  horticulturalists, which means they were

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?