What is the primary cell type involved in humoral immunity?

What can be said about farmers in highly developed countries? a) they have little or no negative impact on the environment. b) they practice subsistence agriculture. c) they are able to incorporate polyculture into their farming practices. d) they utilize organic farming techniques on a regular basis. e) they rely on large amounts of energy from fossil fuels.

What are examples of the plant life and animal life that can be found in each type of terrarium

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs