2 points 4. Homologous structures are body parts of organisms that are similar in
structure and position but have different function. Which set of organism
structures are homologous? *
a. wing of a bat; wing of a bee
b. flipper of a porpoise; foreleg of an elephant
c. flipper of a whale; leg of a centipede
O d. leg of a spider; leg of a frog

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

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