10. Which of the following sequences MOST likely represents ecological succession on an abandoned field? *
shrubs - grasses - native trees - flowering plants
native trees - shrubs - flowering plants - grasses
grasses - flowering plants - shrubs native trees
flowering plants - native trees - shrubs - grasses

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes

In general, are there any major differences that you can see? explain

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled