A person who has allergies has a compromised immune system because the body's immune system a
attacks its healthy cells.
overreacts to an antigen.
steals nutrients from healthy cells.
O responds to mutagens.

Which equation is used to calculate the magnetic force on a charge moving in a magnetic field

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.