North america is currently experiencing an unprecedented and rapid loss of species. what is believed to be the main cause? answer
a. continental drift
b. human activities
c. north america is not experiencing a rapid loss of species
d. natural cycles
e. increased predation by wild carnivores

Where substance is produced during cellular respiration

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.

You are studying a protein that you call protein x. there is an aspartic acid at a key position in protein x which is important in the folding and stabilization of that protein. if this aspartic acid is changed to a different amino acid, which type of amino acid substitutions is most likely to allow the protein to fold normally?