Marvin blows up a balloon but lets go of it. the air inside is released and the balloon goes up into the air. what best describes what happens? a) gravity pushes the balloon into the air. b) drag is caused by contact of the balloon with the air. c) lift lowers the air pressure on the top of the balloon. d) the thrust of the air propels the balloon in the opposite direction.

According to the loco mass the mass of reactants and products

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?