When sea otters disappeared from the
Pacific coast of North America,

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

Hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?