Ecology Review

Front

All of the living and nonliving things in an area that interact with each other are called a/an ______. Options: community, habitat, population, ecosystem

Back

ecosystem

Front

Which organisms are both secondary and tertiary consumers in this food web? Options: Chemosynthetic bacteria and amphipods, Zooplankton and mussels, Ratfish and octopuses, Galatheid crabs and zoarcid fish

Back

Ratfish and octopuses

Front

In the energy pyramid here, which organisms have the most energy available?

Back

Producers

Front

If there is 1000 Kcal available in the producers in trophic level 1, how much energy is available in the herbivores in trophic level 2?

Back

100 Kcal

Front

Which scenario would best allow the long-term survival of a native herbivore in a grassland ecosystem?
- New producer species immigrates to the ecosystem and increases the diversity of producers.
- The population size of the herbivore's predators and the grasses they eat remain constant.
- Humans in the ecosystem reduce the number of predators in the area.
- A new herbivore that feeds on the same plants immigrates to the ecosystem.

Back

The population size of the herbivore's predators and the grasses they eat remain constant.

Front

Example of a microorganism disrupting the health of ecosystems:

• Single celled fungus living in plant roots, causing plants to absorb and use nitrogen
• Single celled fungus living in potatoes, causing them to be inedible by animals
• Bacteria breaking down the dead organic matter of plants and animals
• Bacteria infects the cells of the lungs, causing a person to produce more mucus

Back

Single celled fungus living in potatoes, causing them to be inedible by animals

Front

Flow of matter in the food web: plants, animals, nematodes, arthropods

Back

plants, nematodes, arthropods, animals

Front

After 16 hours, the yeast population is...

Back

is close to the food source sustainability of its habitat

Front

What are the likely long-term effects on ecosystems if greenhouse gas emissions combined with human over-exploitation of land continue to increase?

Back

a decrease in population numbers and species diversity

Front

Which of these problems could happen if we don't look after the resources we have?

• Loss of animal homes
• Climate change
• Increase in pollution
• All of the above

Back

All of the above