Researchers chose which of the following vectors for gene transfer into cardiac myocytes to reduce non-ischemic heart damage due to its high specificity for cardiac monocytes? a. Lipofection
b. Adeno-associated virus
c. Adenovirus
d. Retrovirus
e. Dendrimer

During a hot day, warm and moist air rises and cools in the atmosphere. which even would occur next on such a day? a. condensed droplets would gather to become water vapor. b. water vapor would condense into tiny droplets. c. water droplets would evaporate to form rain and snow.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

How do living things obtain phosphorus