What is an evolutionary reason why individual ferns may produce millions of spores?

In what way are cities microclimates?

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

Which units ate used to measure both velocity and speed? check all that apply