When the blades of a fan move, they have mechanical energy.

This mechanical energy comes from
A.
electrical energy flowing into the fan from the wall outlet.
B.
sound energy flowing into the fan from a radio.
C.
heat energy flowing into the fan from the air.
D.
light energy flowing into the fan through the window.

A) Electrical energy flowing into the fan from the wall outlet

Explanation:

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.