Meg drew this model to show the carbon cycle. However, there are errors in her model. Which arrows point in the wrong direction?

What is A?

What is B?

What is C?

What is D?

Human activities that do not cause an imbalance in the water cycle and the carbon cycle are considered eco-friendly. The activities that cause an imbalance in the cycles are considered not eco-friendly. Classify the activities as being eco-friendly.

Human activities that do not cause an imbalance in the water cycle and the carbon cycle are considered eco-friendly. The activities that cause an imbalance in the cycles are considered not eco-friendly. Classify the activities as being non eco-friendly.

In an ecosystem, marsh snails feed on phytoplankton and painted turtles feed on marsh snails. Pollution has resulted in the depletion of phytoplankton.

As phytoplankton were destroyed, the population of marsh snails would most likely

In an ecosystem, marsh snails feed on phytoplankton and painted turtles feed on marsh snails. Pollution has resulted in the depletion of phytoplankton.

if the population of of marsh snail decrease due to decrease in phytoplankton, then the population of painted turtles would mostly likely

In this marine food web, the small fish is the prey for the predator fish. Currently, humans are harvesting large numbers of the small fish for food. Which graph correctly depicts the likely effect of the harvesting on the predator fish population?

Which biome is an animal with thick fur best suited for?

Which biome would you not find trees or deep-rooted plants in?

coldest biome with scarce vegetation

dense vegetation with little sunlight reaching the ground

largest biome with abundant rainfall and snow

open spaces with grass but few trees

Small frogs living in a marshy region feed on small insects in the region. The relationship between the frogs and insects is a

An ecosystem is shown in the illustration. Assume that human activities have led to a decrease in the number of eagles. A virus attack on rabbits has led to a decrease in their population in the ecosystem. Which two sentences describe likely effects on the ecosystem? Choose all that apply.

The graph shows the populations of two species over time. Which type of symbiotic relationship does the graph represent?

The graph shows the populations of two species in a particular region over two decades. Based on the graph, what can you conclude about the relationship between the two species?

What is the role of a fungi in the ecosystem?

What is the role of a deer in the ecosystem?

What is the role of plants in the ecosystem?

What kind of interaction is depicted in the image?

A male black bear eats fish in an area of a lake, so other black bears can’t.

A flood hit an area, destroying much of the surrounding ecosystem. One animal species survived the flood, but all of its competitors were eliminated. Despite the reduced competition and an abundance of other resources, there was no substantial growth recorded in the population of the surviving species. What are the plausible reasons for this lack of population growth?

In the carbon cycle, what form of carbon do producers take in from the atmosphere to perform photosynthesis?