PLEASE HELP Which of the following is required for the sodium-potassium pump to transport
potassium ions into an animal cell?
High intracellular concentrations of potassium
High intracellular concentrations of sodium
Low intracellular concentrations of potassium
Energy from ATP

well we can't tell you because we cant see the time give a screen shot or something.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

compost can be added to topsoil as a:

pesticide

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.