The active supine biceps femoris stretch uses which physiological principle to increase flexibility

If someone could do the first couple, just so i can see how it's done that would be great! 20 points. complete a dichotomous key for the 10 leaves on the common leaves sheet. the chart provided here allows for 11 pairs of statements. depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some.

Energy derived from hot rocks and fluids beneath the earth’s surface is

Modern whales developed their traits through natural selection what occurs during the process of natural selection