1. what happens to the ratio of surface area to volume as the cell size increases without the cell changing shape? 2. what does a surface area/volume ratio of 6: 1 (cm) mean for the cell’s ability to get the materials it needs that move across its surface? 3. what does a surface area/volume ratio of 3: 1 (cm) mean for a cell’s ability to get materials across its membrane, compared to the cell with a ratio of 6: 1 (cm) ?

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.