What is intrasexual selection and intersexual selection?

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box

When the cell concentrates potassium within, against the natural tendency of matter, it is performing a. passive diffusion b. facilitated diffusion c. active transport d. pinocytosis

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca