Which is the following is an example of compartmentation at the intracellular level? a. regions of the brain are specialized for different functions. b. the walls of arteries consist of an outer connective tissue layer, a middle layer of smooth muscle and elastic fibers, and an inner endothelial lining. c. the heart is divided into four chambers, with two upper chambers that receive incoming blood and two lower, more muscular chambers that send blood out into the circulation. d. skeletal muscle cells have organelles called sarcoplasmic reticulum (sr) that contain large stores of calcium ions. e. the calcium is released during muscle contraction and then pumped back into the sr as the muscle relaxes.

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.

idk about that one.