____ form in the bone marrow, but ____ mature in the thymus
a. B cells; T cells
b. T cells; B cells
c. B and T cells; B cells
d. B and T cells; T cells
e. B and T cells; B and T cells
ANSWER: d
You might also like to view...
Which species of bacteria is responsible for causing diseases such as rheumatic fever, glomeru-lonephritis, and exudative pharyngitis?
a. Streptococcus agalactiae b. S. pyogenes c. S. pneumoniae d. Enterococcus
Recent research suggests that a homing pigeon can navigate to its home coop from any direction by using ____ as
their compass and ____ as their map.
a. the position of the Sun; olfactory cues b. the position of the stars;other visual cues c. olfactory cues; the position of the stars d. olfactory cues; the position of the Sun e. landmarks; olfactory cues
Hershey and Chase used a DNA-based virus for their work. What would the results have been if they had used an RNA virus?
A) With an RNA virus radioactive protein would have been in the final pellet. B) With an RNA virus radioactive RNA would have been in the final pellet. C) With an RNA virus neither sample would have had a radioactive pellet. D) With an RNA virus the protein shell would have been radioactive in both samples.
What significant conclusion has the classic work on the eyeless and Pax6 genes provided in terms of developmental mechanisms?
What will be an ideal response?