What elements are the most common substance in the human body?? A. Oxygen and phosphorus.
B. Carbon and nitrogen.
C. Hydrogen and oxygen.
D. Calcium and nitrogen

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

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 response is the basis for vaccination. primary secondary tertiary none of the above