Chemical evolution leading to origin of life occurred as
a RNA -> Pre RNA -> prebiotic -> DNA -> Primordial cell
b. prebiotic -> Pre RNA -> RNA
DNA -> primordial cell
c. prebiotic -> RNA ->DNA -> pre RNA -> primordial Cell
d. DNA -> RNA-> Pre RNA->primordial cell -> prebiotic

Which of the following is a cause of a dna mutation? o a. the linking of amino acid subunits into a long chain o b. the transcription of dna into rna o c. an error in the repair of damaged dna d. the diffusion of molecules across the cell membrane submit

The arrows indicate the direction of wind flow. which place experiences monsoons?

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.