Describe various cycle of matter that take place on earth

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

Which of the following statements is accurate about evolution? question 10 options: natural selection only eliminates odd individuals. evolution means that a population never has changes in its genetic frequencies. mutations are always harmful. evolution means that a population undergoes changes in its gene frequencies over time.

This is the nitrogenous base only found in rna