Which of the following statements is true of all organisms in every environment?
O A.
They must compete for essential resources.
B.
They avoid interaction as much as possible.
C.
They are able to produce their own food.
D.
They must consume other organisms for energy
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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.

How would you describe an allele that be expressed and determines an organisms appearance? a.uncapitalized b.responsive c.recessive d.dominant

Why do you suppose the structural polysaccharide cellulose does not contain branches?