Some bacterial cells live in very cold environments (such as the arctic ocean), but they still require membrane fluidity like their cousins from more tropical climates. how would the membrane structure of a bacterial cell from a cold climate be different from the membrane structure of a bacterial cell from a very warm climate?

Answer;

-Arctic microbes would have membranes with more unsaturated fatty acids;

Explanation;

-Increasing the unsaturated fatty acid ratio would make it harder for the fatty acids to pack together. This will keep the membrane fluid at lower temperatures, which will benefit organisms that live in very cold climates.

-At low temperatures, cholesterol increases membrane fluidity by preventing membrane lipids from packing close together. At high temperatures, cholesterol decreases membrane fluidity.

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.