The passage is mainly about . A. the structure of the water cycle B. the role of ’Earth’s systems C. the way the planet appears from outer space D. the environment

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

2polnis which of the following is an advantage of an in vitro experiment?me

The source of energy shown in the image is (renewable, non renewable, polluting) a drawback of building a dam is that (it will destroy ecosystems, it requires fossil fuels, it won’t be useful for irrigation)