Grade 7 24-25 TCBOE Science 7 Post 4

What does a food web represent?

• All connections of energy flow throughout all organisms in a habitat.
• The specific ways that mutualism is carried out.
• A single pathway or energy flow between organisms. 
• How carnivores get their food. 

Refer to the bar graph titled 'Recycling Rates of Selected Products - 2012'. Which event would most likely cause the rate of aluminum-can recycling to rise and steel-can recycling rates to fall?

• an increase in the value of aluminum, and a decrease in the value of steel

• a decrease in the value of aluminum, and a decrease in the value of steel

• an increase in the value of aluminum, and an increase in the value of steel

• a decrease in the value of aluminum, and an increase in the value of steel

The relationship between ticks and a dog can best be described as

• mutualism.

• competition.

• parasitism.

• commensalism.

What term describes two organisms that are seeking the same resource?

• Cooperation

• Competition

• Ecosystem dynamics

• Population disturbances

Peacocks perform an elaborate dance while displaying their tail feathers. What purpose does this action most likely serve for the peacock?

• It keeps their feathers clean.

• It enables them to attract a mate.

• It allows them to more easily lose their feathers.

• It distracts other animals so the peacock can escape.

Changes to abiotic factors in an environment can impact biotic factors. Which statement is the BEST example of this situation?

• Heavy rainfall increases soil erosion.

• Melting glaciers cause sea levels to rise.

• Cold temperatures cause rocks to weather.

• Drought conditions increase competition among consumers.

Which of these is an abiotic element of a desert ecosystem?

• sand
• cactus

• lizard

• insect

In a carbon cycle, organisms exchange carbon dioxide with the atmosphere. What will likely happen if plants are removed from the carbon cycle?

• The process of photosynthesis will not occur and as a result, carbon dioxide from the atmosphere will not enter the living system.

• The process of photosynthesis will not occur and as a result, carbon dioxide will not be released into the atmosphere.

• The process of respiration will occur, but less amounts of carbon dioxide from the atmosphere will enter the living system.

• The process of respiration will occur, but organic carbon will not be converted to carbon dioxide for release into the atmosphere.

Clown fish live among anemones, acting as a lure for the sea anemone's prey. The clown fish get protection and shelter from the anemone. This is an example of which type of symbiosis?

• Commensalism

• Mutualism

• Parasitism

Examine the given graph of population dynamics between two organisms.

What caused the significant increase in the rabbit population after 10 years in the study?

• The fox population had 160 members.

• The fox population reached its lowest size.

• The fox population reached its highest size.

• The fox population only had 20 members.