They re called granum singular and grana plural
Been a bit since I learned this but I believe the answer is B.
Hope this helps.
List of objects that float:
Ice
Wood
Rubber
Soda cans
Plastic toys (such as a duck)
Innertubes
Balloons
Frisbees
Legos
Plastic containers (Tupperware, etc.)
Genetic material, wouldn't that make it DNA? I took Biology last year so it's a little hard for me to remember but I think it is DNA.
