B.13ABD Study Guide

Organize these options into the right categories

Groups:

(a) commensalism

,

(b) competition

,

(c) mutualism

• 
• both species benefit

  from the relationship

• we all get

  something out of

  being together

• when an organism

  tries to “win”

  and be most

  successful in an

  ecosystem

• 
• when you offer

  presents to

  someone without

  any advantage to

  you

• 
• one species benefits

  from the relationship and

  the other is unaffected

• when individuals of two or more

  species that vie for the

  same limited resource

Organize these options into the right categories

Groups:

(a) ecosystem stability

,

(b) parasitism

,

(c) predation

,

(d) ecological relationship

• species may

  benefit, be

  harmed, or have

  no effect in these

  relationships

• 
• how a predator

  obtains its food

• 
• remain in or return to

  its original structure and

  function after a disturbance

• close interactions occur

  between two species within

  an ecosystem

• after a forest fire,

  plants grow back

  and have fresh

  leaves and flowers

• 
• one species benefits

  from the relationship and

  the other is harmed

• one organism of one

  species consumes another organism

  of a different species

• a tapeworm

  lives in its host’s

  intestines and

  takes nutrients

  from the host

• 

Honeyguide bird and badger: Honeyguide birds alert and direct badgers to beehives. The badgers expose the hives and are the first to feed on the honey. Then, the honeyguide birds eat.

• mutualism

• commensalism

• predation

• parasitism

Bird with a nest in a tree: The bird builds a nest in the tree where it can lay and hatch its eggs. The nest does not harm the tree.

• commensalism

• mutualism

• predation

• parasitism

Hermit crab carrying an anemone: The hermit crab will pick up an anemone and carry it on top of its shell. The anemone’s stinging tentacles protect the hermit crab and provide camouflage. Food scraps from the crab’s foraging are available to the anemone. The sessile anemone moves with the hermit crab and has a larger area for obtaining food.

• mutualism

• predation

• parasitism

• commensalism

Cheetah and antelope: A cheetah chases down and unalives an antelope for his dinner.

• predation

• parasitism

• mutualism

• competition

Deer and tick: Ticks feed on deer blood, irritating the deer and potentially infecting it with a disease, such as Lyme disease.

• parasitism

• predation

• mutualism

• commensalism

A simple model showing energy flow in an ecosystem is a(n) ​ (a)   . Many food chains grouped together to illustrate an ecosystem's trophic relationships is called a(n) ​ (b)   . A food web can be shown on a(n) ​ (c)   , which organizes its energy levels in an ecosystem. An ecological pyramid is divided into ​ (d)   and follows the ​ (e)   .

• food chain
• food web
• ecological pyramid
• trophic levels
• 10% energy rule

Which trophic level would the plankton belong in?

Which trophic level would the krill belong in?