Which of these oceans remain frozen accept for part of the year, when the edges melt? (Choose all correct answers)

Arctic

Indian

Pacific

Southern

Atlantic

(please no links thank you)

Contrast how pollination is different among gymnosperms and angiosperms.

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.