10. Rico, a scuba diver, uses breathing gear to help him breathe air underwater. He always gets enough sleep and eats a good breakfast
before a dive. What could happen if his breathing gear broke during a dive
and he could not breathe as much air as usual? *

This question is incomplete as it lacks options. The options are:

A) It would be difficult to swim, because his cells cannot work without molecules from air.

B) It would not affect him because his cells are getting the different types of molecules they need from food to work properly.

C) It would not affect him as long as he slept enough.

D) It would not affect him because his body can function normally even if his cells do not have molecules from air.

The answer is A

Explanation:

Breathing gears called SCUBA are devices designed to help human divers breathe under water as oxygen is very scarce as one gets deeper into water. The scuba supplies the air needed to breathe under water in order to supply the oxygen molecules present in air into our cells for the synthesis of ATP (energy).

According to this question, Rico is reported to eat healthy foods and sleeps well, however, these cannot substitute for a constant supply of air. if Rico's breathing gear broke during a dive and he could not breathe as much air as usual, It would be difficult for him to swim, because his cells cannot work without oxygen molecules got from air i.e. oxygen from air is very needed to synthesize energy that cell uses to carry out its functions.

im not in connections yet but i might can you some questions. what grade are you in?

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!