D. DNA
All organisms contain dna
They provide the immune system with "memory" against previously encountered pathogens.
T memory cells are necessary for protective immunity against invading pathogens
Nuphar type of plant life will be found along a tidal marsh
<u>Explanation:</u>
Nuphar advena is really alike to Yellow Pond Lily, although its petals are normally kept scant bits over the water. It is being predominantly a species of tidal marshes on the Hudson River. Yellow Pond Lily can be differentiated from other features of the Nuphar species by the size of its petals and the size and appearance of its flowers.
For food and shelter, the snapping Turtles too practice Nuphar varieties. The food of Ducks in pond is comprised mostly of vegetative substances, particularly the grains of aquatic plants, including plants in the Nuphar variety.
