Which sources of energy can be used to turn turbines to produce electrical energy? Lightning and fuel
Tides and clouds
Water and the sun
Wind and water

Chromosome 17 is made of over million base pairs.

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.

What element has similar physical and chemical properties as boron.