In the same science fair, tina asks the question “does caffeine increase the heart rate of an earthworm? ”
in test 1, she measures the heart rate by looking at the earthworm under a microscopes, the earthworm
has a heart rate of 50 bpm (beats per minute). in test 2, she places a few drops of caffeine on the
earthworm’s skin and measures the rate again. in this test, the heart rate is 68 bpm.

In 1992, hurricane andrew left a wake of destruction through florida. one victim of the storm was a reptile-breeding facility. over 900 burmese pythons were set free, and today thousands of pythons live in florida. these pythons are an invasive species, or a harmful species not native to the region. 1. what impacts do you think the burmese pythons might have on local ecosystems

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

Why is it to call the calvin cycle the light independent reactions vs the dark reactions