In vertebrates, the _______ is/are usually replaced by ________.
What will be an ideal response?
notochord; a vertebral column
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In humans, ability to roll the tongue (R) is dominant to being unable to roll (r). Having freckles (F) is dominant to having no freckles (f). A man heterozygous for both traits marries a woman heterozygous for both traits
What is the probability that they will have a child with freckles? A. 9/16 B. 3/16 C. 1/16 D. 3/4 E. 1/4
____ is an interaction in which individuals require the same resource, and therefore the availability of that resource is lowered
Fill in the blank with the appropriate word.
Sidney Brenner found bacteriophage T4 point mutants in which a protein was prematurely terminated. The premature termination point of the protein was different in different mutants
When he determined where the protein synthesis terminated for each mutant, in every case the next amino acid of the protein would have been a glutamine, lysine, glutamic acid, tyrosine, or serine. What is the unique similarity of these amino acids or their codons that would play a role in the premature termination of translation in the mutant protein gene? A. Each of the amino acids has an R-group containing an amine, hydroxyl, or carboxyl group. B. Each of the codons for these amino acids contains either U or G. C. Each of the codons for these amino acids could be changed to UAG with a single nucleotide mutation. D. Each of the amino acids is polar and charged.
What will happen if a bacterial cell is pretreated with a lysozyme solution, then placed in distilled water?
A) The cell will plasmolyze. B) The cell will undergo osmotic lysis. C) Water will leave the cell. D) Lysozyme will diffuse into the cell. E) No change will result; the solution is isotonic.