Which of the following describes a way in which bacteria are harmful to humans?

a. some vitamins, such as vitamin k, are made by bacteria in the human gut.
b. some common foods, such as yogurt and swiss cheese, are made using bacteria.
c. some human diseases, such as cholera and dysentery, are caused by bacteria.
d. some medicines, such as erythromycin and tetracycline, are made by bacteria.

Antoine manages a number of apartment buildings that use natural gas for heating, cooking, and laundry. the scatter plot shows the correlation between the outside air temperature and antoine's natural gas bill. which type of correlation does the plot illustrate?

Me brainliest 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?

How and why organisms are hierarchically classifies