3tc is an antiretroviral treatment used to prevent hiv infection from becoming aids. after treatment with 3tc, the hiv population in a patient consists entirely of 3tc-resistant virus particles. what best explain this phenomenon? a) hiv can change its surface proteins through mutations and resist vaccines. b) the patient became re-infected with 3tc-resistant viruses after the initial exposure. c) the drug caused rna changes to occur, creating a resistance to the once-applicable drug. d) a few drug-resistant viruses were present at the start of treatment and selective pressures increased their frequency.

D

Explanation:

3TC is an antiretroviral treatment used to prevent HIV infection from becoming AIDS. After treatment with 3TC, the HIV population in a patient consists entirely of 3TC-resistant virus particles. What best explain this phenomenon?

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.