You are in the lab trying to identify protein x. the first gel you run for protein x gives you one band at 30 kd and another band at 75 kd. you run another gel for protein x using another technique. this time, you get one band at 210 kd. circle below the possible techniques you used to obtain the above results.

SDS plus reducing agent in the first gel & SDS alone in the second gel

Explanation:

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.