Which of the following best describes a sex-linked trait? a. a trait determined by a gene located on an individual's y chromosome only b. a trait whose expression depends on whether an individual is male or female c. a trait determined by a gene located on an individual's x chromosome only d. a trait determined by a gene located on an individual's x or y chromosome

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.

Consider the activity and specificity of the three enzymes.pepsin is most active in the human and to digest