Ron is running an experiment to see if certain sounds can improve memory. while testing the subjects’ memory, ron unintentionally smiles when the subjects seem to be arriving at the proper answer. his smile the subject pick the correct answer. in this case, ron is showing
a. invalid experimental placebos.
b. experimental bias.
c. experiment effect.
d. informed consent.

Is it considered muscle s ennervation if sympathetic fibers innervate the vessels within the muscle?

What best describes lactic acid fermentation?

20 point pls brianliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?