The primary targets for HIV are ____
a. helper T cells and macrophages
b. helper T cells and cytotoxic T cells
c. B cells, helper T cells, and cytotoxic T cells
d. B cells and helper T cells
e. B cells and macrophages
ANSWER: a
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____ stimulates the growth of cells that will
produce milk proteins.
a. Estrogen. b. Prolactin. c. Oxytocin. d. Prostaglandin. e. Progesterone
Which of the following statements about the fundamental and realized niche are true? Check all that apply.
_____ A species' realized niche could be the same size as its fundamental niche. _____ A species' realized niche could be smaller than its fundamental niche. _____ A species' fundamental niche can be smaller than its realized niche. _____ The extent of the realized niche is determined, in part, by interspecific competition. _____ The extent of the fundamental niche is determined, in part, by conditions of the physical environment.
Historically, most classification has been based on ________ similarity
Fill in the blank(s) with correct word
During translation, uncharged tRNA molecules leave the ribosome from this site.
A. P B. termination C. A D. E E. release