Smiling when happy seems to be an expression common to all human societies, suggesting that this behavior is probably
A) genetic in origin. B) based on social standing.
C) altruistic. D) learned.
A
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A stop codon
A. codes for the stop amino acid s-methyl-methionine. B. forms a hairpin loop forcing the ribosome to fall off. C. codes for no amino acid. D. enhances the binding of the e-polymerase. E. codes for the stop amino acid s-methyl-methionine AND forms a hairpin loop forcing the ribosome to fall off.
A karyotype is an image of _____ from of a single cell
a. base sequences b. chromosomes c. hereditary information d. clones e. nucleus
What does a branch point in a phylogenetic tree represent?
What will be an ideal response?
What is the outermost tissue layer in animals, or the epithelial layer of skin, also called?
A. Epidermis B. Dermis C. Hypodermis D. Glial cell layer E. Loose layer