Infectious diseases are caused by?

A. Pathogens
B. vaccines
C. Antibodies
D. Minerals

List two limitations of natural selection

Explain why it’s important for scientists to study the sun. list at least two challenges researchers face when examining earth’s nearest star.

The recycling of water from the ground via runoff or transpiration through plants back into the atmosphere is known as part of the question 6 options: hydrogen cycle nitrogen cycle transpiration water cycle