Which option(s) would correctly describe normal force? (Select all that apply)

a field force

a contact force

a supportive force that acts at night angles to a surface and helps support an object sitting on that surface

a force that acts in the same direction as gravitational force

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria

The production of cells during mitosis into specialized function is recombination or differentiation

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen