Check my
hiv is spread through the body, how?
a. after it replicates and leaves the macrophage by rupturing it
b. by taking over the host macrophages dna and directing it to attack other cells
c. by budding from the macrophage and enveloping itself with the hosts cell membrane d. by attaching the lymphocyte's ccr5 receptors to itself which fools other lymphocytes

i chose c, am i right?

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

what is shown in the image?

eukaryote

chloroplast

mitochondrion

submitted