A boy and his younger sister are at the zoo on a hot day. They each buy a cold lemonade. The boy buys a large lemonade and his sister buys a small. They set their cups on a hot table and wait a while before they start drinking. When they finally begin to drink their lemonade, the girl complains that her drink is no longer cold. However, the brother states that his larger drink is still cold. Which of the following statements best explains why the boy’s drink is still cold, but the girl’s drink is not?

A. The large cup of lemonade has more particles and requires more energy from its surroundings to warm up.
B. The large cup of lemonade has more particles and requires less energy from its surroundings to warm up.
C. The small cup of lemonade has fewer particles and requires more energy from its surroundings to warm up.
D. Both cups of lemonade require the same amount of energy from their surroundings to warm up to the same temperature.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!

the answer is c on e2020, bud.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.