What are relationships between species that are adapted to each other and may be mutually beneficial or involve exploitation called?

Which of the following cognitive skills have not been displayed by animals? a. using tools b. forming concepts c. transmitting culture d. using syntax

As the earth formed, the force of gravity increased due to increased mass. what effect did this increased gravity have on the forming planet?

Mrna: gcuaauguc what amino acids does the mrna above code for? what type of amino acids or function are uag, uga, and uaa coding for? which codon (3 letters) signals translation to start and also codes for the amino acid methionine (met)?