6.LS2.1-2 & 2.7 Quiz

Which relationship represents an example of mutualism?

• an owl and a snake feeding on rats

• a lynx hunting a snowshoe hare

• an ant colony living on an acacia tree and not allowing vines to grow on the bark

• a tapeworm absorbing nutrition from the intestines of a host organism

Tags

NGSS.MS-LS2-2

Remora fish attach themselves to the bellies of sharks and travel everywhere the sharks go. Remora fish eat parasites present on the sharks, keeping the sharks clean and healthy. Why is this relationship an example of mutualism?

• Remora fish gain nutrients from the parasites.

• Both the remora fish and sharks benefit from each other.

• Only sharks have parasites removed.

• Both the remora fish and sharks compete for resources.

Tags

NGSS.MS-LS2-2

The table shows four examples of interactions between two organisms.

Which examples represent parasitic relationships?

• 2 and 3

• 1 and 4

• 1 and 3

• 2 and 4

Tags

NGSS.MS-LS2-2

The American cancer root is a non-photosynthetic plant that attaches itself to the roots of some oak tree species. The plant obtains nutrients from the roots of the oak tree, while limiting the amount of water the oak trees can absorb. Which ecological relationship does the American cancer root plant share with an oak tree?

• competition

• parasitism

• mutualism

• cooperation

Tags

NGSS.MS-LS2-2

The American alligator and the freshwater crocodile are similar species that feed on fish, amphibians, mammals, and birds. The alligator is found in America whereas the freshwater crocodile is found in Australia. Which statement describes the most likely interaction between these two species if they were suddenly living in the same ecosystem?

• Both the alligator and the freshwater crocodile would form a mutualistic relationship.

• The alligator would act as a predator to the freshwater crocodile.

• Both the alligator and the freshwater crocodile would compete for food resources.

• The freshwater crocodile would act as a predator to the alligator.

Tags

NGSS.MS-LS2-2

In an experiment, a scientist introduces 20 freshwater fish of the same kind into an aquarium containing freshwater. The next day, the scientist decreases the pH of the water by adding vinegar. The scientist continually decreases the pH every day by adding an additional 100 mL of vinegar. The graph shows the data collected. What effect does acidifying the water have on the population size?

• It initially decreases the population size before increasing the population size.

• It decreases the population size.

• It initially increases the population size before decreasing the population size.

• It increases the population size.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS1-5

Examine the diagram that shows a pond and several organisms that live in it. A flock of geese migrates to the pond. Which statement describes a possible negative effect of this migration on the pond environment?

• The geese will bring new resources to the pond.

• The population density will increase.

• The pond will flourish due to the addition of a new species.

• The population density will decrease.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The graph shows the population of honeybee colonies from 1935 to 2015. What is a reasonable explanation for the trend in the population of honeybee colonies?

• The death rate of the honeybee population is equal to its birth rate.

• The honeybee population experienced an increase in food resources.

• The death rate of the honeybee population is greater than its birth rate.

• The honeybee population experienced a decrease in the number of infections.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Examine the graph. What is represented by the dashed line on the graph?

• death rate

• carrying capacity

• birth rate

• emigration maximum

Tags

NGSS.MS-LS2-1

Caribbean reef squids have many color-changing cells called chromatophores just below the surface of their skin. These cells help them change their skin colors and patterns. The adult male Caribbean reef squids change their color from mottled green to bright red. They also show zebra-like patterns to exhibit good health and physical strength. These patterns and bright colors are very different than the seafloor where they live. The reef squids that are best able to change colors are the first to reproduce.

Which is the most likely reason for Caribbean reef squids to change their skin to different colors and patterns?

• to avoid their predators

• to attract their mates

• to find their prey

• to mark their territories

Tags

NGSS.MS-LS1-4

NGSS.MS-LS4-4