Which if these are likely benefits if abstinence select three

What is the name of the tool scientists use to identify a species? species key dichotomous key species marker dichotomous marker

The frequency in wich you perform certain exercise depends on the blank of the exercise

Mason joined the water polo team at his school. as part of his conditioning, mason's coach requires a 25-minute run during practice. mason's heart rate reaches 125 beats per minute, but his target heart rate zone is 138—183 beats per minute. what should mason do to get the most benefit for his heart? increase the amount of time he runs increase the speed at which he runs decrease the amount of time he runs decrease the speed at which he runs