Please select the answers below that correspond to structural features of HIV and their host cells necessary for HIV infection to occur.
> The HIV envelope contains glycoproteins that mediate viral absorption and fusion to the host cell.
> The helical HIV capsid opens to allow access of its single-stranded DNA genome to the host cell genome.
> Infectable host cell membranes must present surface receptors including a CD4 marker, as well as a co-receptor.
> Infectable host cells must actively phagocytize the HIV particle through the host cell membrane.
> The HIV envelope contains glycoproteins that mediate viral absorption and fusion to the host cell.
> Infectable host cell membranes must present surface receptors including a CD4 marker, as well as a co-receptor.
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The passage of an arthropod through stages from egg to adult is
A. differentiation. B. evolution. C. graduation. D. metamorphosis. E. succession.
________ is the ability to distinguish two objects that are close together as separate. In any microscope, this ability is determined by ________
Fill in the blank with correct word.
The femur in a snake and pelvis in a whale are examples of
A. homologous structures. B. analogous structures. C. homeotic structures. D. vestigial structures. E. heterologous structures.
Using OLS to solve for the slope and intercept of a simple linear regression will yield a regression line that satisfies which of the following conditions?
A. 
= 0
B. 
= 
C. Sum of squared residuals equals 0.
D. None of the answers is correct.