4. In the United States, the most energy-demanding activity in a typical home is... A. lighting. B. heating and cooling
C. using appliances,
D. charging computers and electronics.

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red.b) the pollen grains will be pure blue.c) the pollen grains will have red interiors and blue exteriors.d) the pollen grains will have blue interiors and red exteriors.

What element does susan b. anthony include in this passage to strengthen her argument?

During convection, less dense fluid rises and denser fluid sinks.