Passive immunity is described as?
a. occurs after a specific immune response
b. antibodies produced by B cells
c. Already there when we are born
d. occurs without an immune response

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

What have we learned from fossil evidence about evolution? a) it is an abrupt change. b)the process is observable. c) it takes place during one lifetime only. d)the most complex traits are always selected.

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.