Which of the following groups of bacteria lives in environments similar to those that may have existed on the early Earth?
A) deeply branching bacteria
B) cyanobacteria
C) mycoplasmas
D) thermophiles
E) proteobacteria
A
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Which organelles make and store pigments other than chlorophylls?
a. plastids b. chloroplasts c. chromoplasts d. central vacuoles e. vesicles
In fish, jaws evolved from ________
a. gills b. armor plates around the heads of placoderms c. the spiracle d. supporting structures for gill slits
A tRNA molecule is "bilingual" because it "speaks the language of" or binds to
amino acids and DNA DNA and mRNA codons promoters and amino acids codons of mRNA and amino acids promoters and terminators
Systemic lupus erythematosus (SLE or lupus) is distinct from other autoimmune disorders because
A. it is also a hypersensitivity disorder. B. it involves an antibody response. C. multiple organs and tissues are affected. D. it may be triggered by an infection. E. there is a genetic predisposition.