Astudent notices that when bananas are kept near other fruits, the other fruits ripen faster. she wonders what causes the other fruits to ripen more
quickly and thinks that bananas must have an influence on the npening process. she decides to perform an experiment. she gathers bananas and
apples and places an apple by itself at location a and an apple next to a banana at location b. she then waits for five days and records the how ripe
each apple is
bio

the presence of a substance called ethylene ripens a this ripened fruit than contains ethylene is kept near other fruits those other fruits get ripened as well.ethylene is a gaseous compound. ethylene is also a plant hormone.

explanation:

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!