Why are certain amino acids called essential amino acids? a. because they are available in abundance b. because they are not manufactured by the body c. because they can form bonds with any molecule d. because they are the most stable among all the amino acids e. because they are needed for the formation of all biomolecules

Based on the phylogenetic chart, which three statements are true about the relationship between the organisms? a human is more closely related to a mouse than a kangaroo. a platypus is more closely related to kangaroo than a mouse. a human and a kangaroo share common features because of a common ancestor. a platypus and a mouse are more closely related than a platypus and a kangaroo. a kangaroo and a mouse are more closely related than a mouse and a human.

Me . based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?