50. A single piece of coiled DNA is called ____.

Grade 9 chemistry:

 Zinc has a density of 7.13 g/cm3. Nasra takes a small piece of zinc and puts it into a graduated cylinder with 30 mL of water. She sees the water level in the graduated cylinder rise to 58 mL. Help Nasra determine the mass of the piece of zinc. Use G.R.A.S.P. (Given, Required, Analysis, Solution, Paraphrase) to show your work. 

A male cow is called?

14. What is the young one of a cow called?