Which of these facts is supported by the rock cycle?

a. limestone is a metamorphic rock.
b. metamorphic rocks are compacted sediments.
c. igneous rock can form from solidified magma.
d. metamorphic rocks are soft and crumbly.

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables

Nucleic acids offer variability because they contain alternate forms of genes called .