If grass stores 2,000 energy units received from the sun, the ecological efficiency of the ecosystems is 10% and the trophic levels are grass – cow – human, how many units of energy does the human receive of the original 2000 units?

20 units of energy

Explanation:

Given that the ecological efficiency of the ecosystem is 10%, (meaning as energy is transferred from one trophic level to another, 90% of energy is being lost), units of energy the human received of the original 2000 units can be calculated as follows:

Energy received by grass = 2000 units

Energy transferred to cow = 10% of 2000 units = 10/100 × 2000 units = 200 units (1800 units is lost)

Energy transferred from cow to the human = 10% of 200 units = 10/100 × 200 = 20 units (180 units lost)

Only 20 units of the original 2000 units is received by the human.

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )

b is dominant over the allele for the white fur.