Ecology Unit

A pond ecosystem is shown in the diagram below. Which statement describes an interaction that helps maintain the stability of this ecosystem?

• The frogs make energy available to this ecosystem through the process of photosynthesis.

• The algae directly provide food for both the rotifers and the catfish.

• The green-backed heron provides energy for the mosquito larvae.

• The catfish population helps control the populations of water boatman and waterfleas.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-1

A relationship that describe a close interaction between two different species is known as what?

• Biodiversity

• Symbiosis

• Predation

• Emigration

Tags

NGSS.MS-LS2-2

The organism that is hunted and eaten in a particular feeding relationship is known as:

• Predator

• Decomposer

• Prey

• Autotroph

Tags

NGSS.MS-LS2-4

This is known as a relationship in which both organisms involved benefit. 

• Predator-Prey

• Commensalism

• Mutualism

• Decomposition

Tags

NGSS.MS-LS2-2

Cordyceps are a type of a fungi that hijack insects muscular and nervous systems, eventually leading to the death of the insect. What type of relationship is this?

• Commensalism

• Predator/Prey

• Parasitism

• Competition

The graph below shows population data for two species.  What can be said about the relationship between species 1 and species 2?

• When the population of species 1 increases, the population of species 2 decreases.

• The population of species 1 and species 2 stay the same over the time period shown.

• The population of species 1 is not influenced by the population of species 2.

• When the population of species 1 increases, the population of species 2 increases.

Tags

NGSS.MS-LS2-2

What causes competition among organisms?

• One organism tries to live on or in the other organism.

• Both organisms attempt to

  use the same limited resources.

• Both organisms try to take

  on the form of the other.

• One organism tries to prey

  on the other organism.

Tags

NGSS.MS-LS2-1

In a simple food chain, small fish eat algae; bigger fish eat the smaller fish; bears eat the bigger fish. 
Using the above scenario, which of these would have the largest amount of energy?

• algae

• bears

• big fish

• small fish

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which of the following would qualify as an "ecosystem"?

• a group of prairie dogs

• a group of prairie dogs and a group of trees

• a group of prairie dogs, a group of trees, and soil

• a single prairie dog

Tags

NGSS.MS-LS2-3

A Consumer that has a diet of only plants is called a

• heterotroph

• herbivore

• producer

• community