Which two elements have properties of both metals and nonmetals? beryllium (Be)
iron (Fe)
silicon (Si)
tellurium (Te)
tungsten (W)

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

What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms

Kinases add - groups to other enzymes. this activities some enzyme while inhibiting other