If a gene is said to be highly conserved, what do we think we know about
it? Select all that apply.
-Its sequence is probably shared among a lot of organisms
-Its sequence will never change
-It probably appeared a long time ago in an ancient ancestor
-It is probably very important
-It probably appeared very recently

I would say A, C, and D

Explanation:

If we know a gene is highly conserved then the gene sequence is similar among different organisms suggesting a common ancestor, and because it does not change then it's role must be very important.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

zxndjdjxjjxik no f cnnxn k is s dksoozkdkxjxjxjxj