If a sedimentary rock contains inclusions of
metamorphic rock, which rock is older?

The metamorphic rock.

Explanation:

The metamorphic rock went under heat and pressure before being sandwiched in silt to become part of sedimentary rock. Think of it like the McFlurry. You've got to bake the Oreo before adding it to the ice cream.

The metamorphic rock would be older, because in the sedimentary rock's formation that is caused by collected sediment taking years to harden and turning into a rock, the metamorphic rock would have already been considered metamorphic when traces of it came into the sedimentary.

Explanation:

the backbone of the dna and rna compound is sugar phosphate.

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus