Which element has a complete valence electron shell?

Why do scientists and other people in most countries use the metric system for measurents?

Does a spider have a backbone

Which features are created by depositions from rivers

What would happen i we had no cilia in our trachea?

When air gets warm does it sink or rise?

Why might a water table drop

How did the 1898 discovery of blood types affect society?

Which of the following is a feeding source for fens? aquifers dexfoliants exfoliants nitrates

What system includes oceans, lakes, rivers, and groundwater? a. geosphere b. hydrosphere c. atmosphere d. biosphere

Fungal spores a. are only asexually produced. b. cannot be seen in a light microscope. c. are used to identify fungi. d. are produced by molds but not by yeasts. e. are only produced under harmful environmental conditions