Which of these is an environmental change that occurs rapidly?
a- regrowth after flooding
b- human population growth
c- hurricane
d- ecosystem changing from a meadow to pond

Dna is the genetic material that makes up living things, and folic acid plays an important role in the information of dna. jon wants to study the effect of folic acid on dna formation in microbes. which statement accurately describes the variables in this study

What is a cordon and where is it found

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in