Match the statements with the corresponding MHC Class:
Acquires antigenic peptide in the cytoplasm

a) receptors located exclusively on antigen presenting cells
b) presents antigenic peptides to CD8+ T cells
c) necessary for recognition by CD4+ T cells
d) receptors located on all nucleated cells

How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u.s. fish and wildlife service

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming

Some plants have reproductive structures that them reproduce using natural forces or animals. how does the reproductive structure shown here ensure the reproductive success of plants?