In normal differentiated somatic cells, telomerase Group of answer choices repairs double strand breaks in DNA. adds material to the ends of chromosomes with each cell division. is not expressed and telomere tips erode with each division. removes telomere tips with each division.

When explaining dominant and recessive traits to a younger family member, they respond, "well chances are i can probably taste ptc, since dominant traits are more common." how might you address this misconception?

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

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.