Read each of the following passages. After each passage, choose the term that mo

Question

Read each of the following passages. After each passage, choose the term that most appropriately completes the sentence. © Photographer's Choice RF / Getty Images Prairie lily, Liium philadelphicum, is a plant with showy orange petals. It thrives only in healthy prairie habitat in the American Midwest, and it is very sensitive toElephant herds break and uproot environmental change. Manoj Shah / Getty Images © National Park Service Elephants, Loxodonta africana, in the African savanna keep the trees in check. The zebra mussel, Dreissena polymorpha, is a small freshwater mussel whose original range was in southeast Russia. It was probably introduced to North America in bilge water released into the Great Lakes by cargo ships. D. polymorpha has no trees, preventing them from dominating the grassland Scientists can use the health and abundance of L. philadelphicum populations to help quantify the health and extent of prairie ecosystems. If L. africana disappears from savanna, the savanna disappears and is replaced by woodland. the natural predators in the United States, and it is now a destructive nuisance in the lakes and rivers of most of the country Lilium philadelphicum is: Loxodonta africana is: Dreissena polymorpha is O An indicator species O A nonnative species O A keystone species O A nonnative species O A keystone species O An indicator species O A keystone species O An indicator species O A nonnative species

Explanation / Answer

Lilium philadelphicum is an ""indicator species"" which means it abundance or presence indicate specific conditions of the environment, here this species thrives only in American Midwest, in the prairie type of climate.

Loxodonta africana is a ""keystone species"" which means after the removal of the predator species there is an increases of prey population, here elephant herds uproot and break trees, preventing from domination in the grassland.

Dreissena polymorpha is a nonnative species which is a freshwater mussel who range was originally found to be from southeast Russia.

Related Questions

Navigate

• Browse (All)
• Browse R
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.