Which of these describe a physical property?

reacts with acid

less dense than water

does not burn

rusts easily

Amutagen is 1: a living thing that has undergone a mutation. 2: an agent that causes a mutation in dna. 3: a mutation that has affected one gene. 4: a chemical that can poison living cells.

What is a gene ? a) a section of a protein that codes for dna. b) the alternate version of a trait. c) the visible trait in the f1 generation. d) a section of dna that codes for a specific trait .

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above