The movement of the crust is thought to be driven by what process? A. Seismic waves from earthquakes
B. Flow of lava within the crust
C. Gravitational waves
D. Convective currents in the upper mantle

The body is protected against harmful flu viruses by

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.