A scientist makes a discovery that suggests a hominid species created and used relatively sophisticated tools. The scientist decides to publish his findings. Which of the following sources would be regarded as the most reliable?

A scientific magazine article
A college or university website
A film on anthropology
A journal reviewed by peers

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

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).

18. which statement about cancer is true?