What is the term for an organism that obtains its energy by eating other organisms?

The correct answer will be heterotrophs.

Explanation:

Heterotrophs are the organisms which are not able to synthesize their food from inorganic substances.

They depend on other organic sources for their energy which they do so by eating or consuming either autotroph (which produce their food) or organisms which eat autotrophs.  For example, Humans can eat autotrophs (plants, vegetables) and goat (eat autotrophs).

Thus, heterotrophs is the correct answer.

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation: