Ecology I

A food chain is illustrated
The squiggly arrows shown most likely indicate

• Energy released from metabolism into the environment as heat.
• Oxygen released from metabolism produced by cellular respiration.
• The absorption of energy from the environment that has been created.
• The transport of glucose away from the organism through photosynthesis.

If several species of carnivores are removed from an ecosystem, the most likely effect on the ecosystem will be:

• An increase in the kinds of autotrophs
• A decrease in the number of abiotic factors
• A decrease in stability among populations
• An increase in the rate of succession

A pond ecosystem is shown in the diagram below. Which statement describes an interaction that helps maintain the dynamic equilibrium 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.

Why is a mushroom considered a heterotroph?

• It creates different types of food.
• It makes food through photosynthesis
• It makes food through chemosynthesis.
• It obtains nutrients from its environment.

The diagram shows the cycling of nutrients in an ecosystem.
The removal of which of the following groups would cause an immediate decrease in the amount of energy flowing through the system?

• Producers
• Consumers
• Decomposers
• Inorganic nutrients

A food web is shown
Which of the following organisms compete for the mouse as a food source?

• hawk and snake
• snake and kinglet
• oak tree and pine tree
• pine borer and salamander

Tags

NGSS.MS-LS2-1

Leaves fall from deciduous trees in autumn. The carbon in these leaves is returned to the atmosphere through which of the following processes?

• condensation
• decomposition
• photosynthesis
• transpiration

all populations of all species living in an ecosystem.

• population
• community
• ecosystem
• species

The role or function or job of a species in a community.

• habitat
• diet
• niche
• ecosystem

A collection of organisms that make up a community as well as all of the nonliving aspects of the environment.

• Population
• Community
• Habitat
• Ecosystem