Food Webs Food Chains and Ecosystems Symbiosis

When two different species attempt to occupy the same niche, one of the species will eventually decline in number due to – 

• competition for the same resources 
• mating between the two species 
• one of the species eating the other
• an increase in mutualistic behavior

Tags

NGSS.MS-LS2-1

. In an ecosystem, members of the lizards are observed eating members of the insect population.  In this same ecosystem, birds are also observed using insects as a food source.  The relationship between lizards and birds would best be described as –

• predator 
• competitive 
• parasitic
• mutualistic

Tags

NGSS.MS-LS2-2

A lichen is composed of two organisms, a fungus and a cyanobacterium. The fungus provides a growing surface, moisture, and nutrients to the cyanobacterium. The cyanobacterium provides food to the fungus. This relationship is considered to be an example of which of the following?

• Commensalism
• Mutualism
• Neutralism
• Parasitism

Tags

NGSS.MS-LS2-2

Which of the following sets contains organisms that could be classified as secondary consumers?

• Salmon, Marsh Hawk, Bald Eagle
• Rat, Herring, Grasshopper
• Bald Eagle, Rat, Herring
• Snails, Herring, Salmon

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

The acacia ant nests and feeds in the plant’s hollow thorns. The ant helps protect the bullshorn acacia by attacking insects and grazing animals that come near the plant. The relationship between the acacia ant and the bullshorn acacia is an example of which of the following?

• Commensalism
• Mutualism
• Neutralism
• Parasitism

Tags

NGSS.MS-LS2-2

Gobies are a type of small fish that live in small burrows.  Sometimes these burrows are created and maintained by burrowing shrimp.  The goby shares the burrow with the shrimp and uses it to protect its eggs.  The shrimp has poor eyesight, but monitors the behavior of the goby with its antennae.  When it feels the shrimp retreat into the burrow away from danger it quickly follows.  This relationship demonstrates which of the following?

• parasitism
• mutualism
• commensalism
• predation

A native species and a non-native species are competing for resources within the same ecosystem. The non-native species is more likely to survive than the native species in which of the following situations?

• Both the native species and the non-native species thrive on the same food source.
• The native species is immune to certain pathogens in the ecosystem.
• Predators prey on both native and non-native species.
• The non-native species has no natural enemies in the ecosystem.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A mutation that occurs in the gametes of an organism will most likely be transferred to which of the following?

• The siblings of the organism
• The offspring of the organism
• The other organisms living nearby
• The mating partner of the organism

Tags

NGSS.MS-LS3-1

NGSS.MS-LS3-2

The graph shows the basic changes in a forest community after a disturbance occurred.
The information shown in the graph suggests that the changes in the forest community were caused by —

• tree-leaf replacement after a storm
• succession after a fire
• repeated habitat destruction
• decreased species diversity

Tags

NGSS.MS-LS2-4

. In a food web, the population of which organisms would contain the highest amount of biomass?

• Hawk
• Mice
• Corn
• Cricket