The following in an Antarctic Food Web. What role do Phytoplankton and Krill play in this food web? Krill is both a primary and secondary consumer, and phytoplankton is a producer.
Krill is the secondary consumer that feeds on other herbivorous zooplankton, and phytoplankton is a producer just like the carnivorous zooplankton.
Krill is a producer and one of the main organisms of this food web, and phytoplankton will be considered a decomposer.
Krill is a primary consumer, Phytoplankton is a producer just like the carnivorous zooplankton.

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.