B, C, D
A is r-selected species
The answer to this question is 1.DNA because RNA is single stranded.
Graduated Cylinder. A graduated cylinder measures volumes of liquids.
Their purpose is reproduction.
Answer is the first option Place a metal paper clip on a table and slowly bring each electromagnet closer to the paper clip to see which can attract the paper clip from a greater distance.
I don't know why but I find your questions a bit too easy..
