Which statement is a pattern in the fossil record? HELP!

a Earth’s climate has been stable since the beginning of the fossil record. Earth’s climate has been stable since the beginning of the fossil record. , ,

b The gas ratios in the atmosphere have been stable since the beginning of the fossil record.

c Multiple mass extinction events have occurred in Earth’s history. , ,

d Plants have changed very little since the beginning of the fossil record.

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

How do you convert 4 mmol of bromobenzene to ml?

Given the data below for the reaction, 2 a + 2 b + 4 c => d + e + 3 f, the reaction is fill in the [ ] order in a, fill in the [ ] order in b, fill in the [ ] order in c and fill in the [ ] order overall. (use the words "first, second, third, fourth" to fill each blank)experimentinitial conc of a, mol/l initial conc of b, mol/l initial conc of c, mol/l initial rate, mol/l. s1 0.1 0.1 0.2 2 x 10-32 0.2 0.3 0.2 6 x 10-33 0.3 0.1 0.2 2 x 10-34 0.4 0.3 0.4 1.2 x 10-2