In the Calvin cycle, which of the following best describes the sources of the elements that combine to make sugar?

A. The carbon and oxygen from carbon dioxide combines with the hydrogen and oxygen in water taken in during the Calvin cycle to make sugar.

B. The carbon, oxygen, and hydrogen from stored sugars are reprocessed during photosynthesis to make new sugar molecules.

C. The carbon and oxygen from carbon dioxide combine with the hydrogen taken from water during the light-dependent reactions to make sugars.

D. The carbon that is taken from carbon dioxide during the light-dependent reactions combines with the hydrogen and oxygen in water to make sugars.

b.

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.

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.