Chemical bonds that involve the total transfer of electrons from one atom or group of atoms to another are called a. covalen bonds b. ionic bonds c. hydrogen bonds d. van der waals bonds

Which of the following statements best describes the relationship between the environment and human health? a. the environment is the only factor that affects human health. b. many aspects of the environment can have an impact on human health. c. human health is impacted by changes in climate. d. the environment has no impact on human health. select the best answer from the choices provided

When does dna replication(make a copy of itself)?

Restless tectonic plates move (shift) between one and fifteen centimeters per year month day minute