The efficiency of cells to exchange materials with their environment is proportional to the surface area-to-volume ratio of cells. Which cell would have the highest exchange rate of metabolites with its environment?

A.)An oocyte cell (sphere) with a radius of 50 µm.
B.)An immune cell (sphere) with a radius of 8 µm.
C.)A neuronal cell (solid rectangle) with the dimensions 1 µm x 1 µm x 120 µm.
D.)An epithelial cell (solid rectangle) with the dimensions 3 µm x 10 µm x 20 µm.

Rewrite the following sentences in active voice. caution: one sentence (only one) is written in active voice. do not rewrite it just label it as being active. 1). the use of copernicus's theory was forbidden by religious leaders until 1757. 2). i am puzzled by your question. 3). the girl is frightened by horror movies; she only watches chick-flicks. 4). radium and polonium were discovered by marie curie. 5. most of the town was destroyed by a tornado. 6). these flowers were planted by the 4-h club. 7). the little boy showed his mother the bruises, cuts. and bumps on his shin. 8). pluto was discovered by clyde william tombaugh in 1930 in flagstaff, arizona. 9). the painting was purchased by mr. jones. 10). the song was performed many times by kate smith. 11). england was ruled by a woman nicknamed "bloody mary" from 1553-1558. 12). the law of universal gravitation was discovered by sir isaac newton.

The probability of rolling a sum of 7 when rolling two dice simultaneously is 0.167. you decide to test that probability by rolling th dice 12 times. what is the probability that exactly 2 of the rolls is a sum of 7?

Some studies have found that what percentage of students have cheated in some form? a. 10% b. 25% c. 45% d. 75%