George has several plants in his garden. once in a while, he adds fertilizer to the soil. the leaves absorb the nutrients in the fertilizer and look healthy. if a cell is compared to a plant, which organelle transport fertilizer from the soil to the leaf?
a)lysosome
b)mitochondrion
c)vacuole
d)vesicle

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Amap's orientation is typically determined by an