Under which of the following conditions would photosynthesis be favored over photorespiration? A) a high concentration of O₂ within the spongy mesophyll of a plant’s leaves B) a sunny and windy day in an arid environment C) a high concentration of CO₂ within the spongy mesophyll of a plant’s leaves D) the majority of stomata on a plant’s leaves are closed

the correct answer is C

Explanation:

It is the correct answer since the variations or the partial pressures of CO2 increase the plants that begin to carry out the photosynthesis processes generating as a product 02, the climatic conditions also condition this process, but it is very specific and not correct to say that it only depends of the sunny day, or of the arid climate, since there are plants that subsist and can say this process in extreme climates, humid or rainy.

the man is bald so he has no hair to get wet

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!