Some signals, like growth factors, affect multiple pathways, activating some proteins and inhibiting others in the course of eliciting specific responses. Ras is an oncogene and over activation of Ras is associated with aggressive tumor growth. Which of the following would be expected in response to a growth signal activating Ras that is sustained?

A) apoptosis first, then cell cycle, then cell growth
B) cell cycle first, then cell cycle arrest, then metabolism
C) metabolism first, then apoptosis, then DNA replication
D) cell growth first, then DNA replication, then cell cycle arrest

they deliver oxygen to the blood

condensation. good luck!

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.