The illustration shows a representative food web found in the marine environment. Consider the phytoplankton at the base of the food web. How does the energy that it needs to survive originally enter the food web? The marine food web shows phytoplankton at the bottom of the food web. Arrows extending from the phytoplankton image upward and across point to various organisms such as zooplankton, krill, fish, birds, seals penguins and whales in order of consumption.
© 2016 Mark Flanders

The energy comes from the baleen whales.
The energy comes from the carnivorous zooplankton.
The energy comes from the krill.
The energy comes from the sun.

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

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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:

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explanation:

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