Determine approximately how much total energy is lost from a three step food chain if 1000 calories enter at the autotroph level

The trophic efficiency, this is, the measure of how much of the energy in

organisms at one trophic level is transferred to the next higher trophic

level, of each trophic level is around 10 percent.

Thus, considering a three step food chain, where you get 1000 calories entering at the autotroph level, the amount of energy that would pass to the primary consumers would be 100 calories (10% of 1000).

Then. the amount of energy that would pass to the secondary consumers would be 10 calories (10% of 100).

Finally, the amount of energy lost is the difference between the initial entering energy, 1000 calories, and the final energy, 10 calories:

(1000 - 10) calories = 950 calories

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

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.