The pancreas secretes two hormones—glucagon and insulin—that have opposite effects on blood glucose levels. Which best describes how body cells receive glucagon and insulin?

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.

There are only about 250,000 known fossil species. true or false

Vinegar has a ph of 3, and household ammonia has a ph of 11. is the concentration of h+ greatest in the vinegar or ammonia?