"we are made of stardust" refers to
a. the dust of dead skin cells we shed every day.
b. the rotating cloud of stardust that formed the planets.
c. the gases in the stars that formed the gases in the atmosphere.
d. the rotating cloud of stardust that formed luca and all the organisms that evolved later.

Iwanna go do something with my ideas? ?

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.

Ascientist is designing an investigation to study the impact of invasive bird populations on local, native bird populations at backyard bird feeders. what population is most likely to be a control group for the investigation? amount of food number of bird feeders invasive bird populations local backyard birdfeeders without food