Which of the following is not natural acquisition of immunity?
a. contact with a pathogen
b. antibodies passed on from mother to baby through breast milk
c. vaccination
d. antibodies passed on from mother to fetus through the placenta

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 are the headings of a data table

Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.