Which statement best describes the difference between xylem and phloem?
a
Xylem transports water and nutrients in the plant, and phloem transports water and sugar.
b
Xylem cells are thin-walled and tubular, and phloem cells are thick-walled and strengthened by lignin.
c
Xylem tissue is found in the growing parts of plants, and phloem is found on the outer part of plants.
d
Xylem cells make up vascular tissue, and phloem cells make up ground and dermal tissue.

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explanation: bc blah

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

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.