A(n) is recognized by lymphocytes to be foreign and causes an immune response. a) t cell b) antigen c) antibody d) histamine

Which is an example of a population?

Which are characteristics of flukes? check all that apply. a they are free living. b they are a type of flatworm. c they reproduce sexually. d they have eyespots. e they are segmented.

1. fold your hands together so your thumbs cross over ,and look at your thumbs. which thumb feels most "comfortable" on top is actually controlled by a gene. the left thumb folding over the right thumb is a domi