Which of the following has not been shown to cause cancer? A) sun
B) Radiation
C) viruses
D)salt

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

What are the three types of counseling established by marine corps policy?

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).