Population Size Answers

What is a possible cause for a decrease in ecosystem productivity?a.an increase in the biodiversity of the ecosystemb.a decrease of the biodiversity of an ecosystemc.the biodiversity of an ecosystem experiencing no changed.an ecosystem becoming more stable

The open ocean, sea floor, and coral reefs are all examples of habitats with high rates of primary production.

Echolocation is an adaptation bats use to _______. a. hunt insects in flight b. locate flowering plants c. find warm places for hibernation d. all of the above Please select the best answer from the choices provided

Which level of consumer has access to the smallest supply of energy? a. primary b. secondary c. tertiary d. quaternary Please select the best answer from the choices provided

Water is an abiotic factor in terrestrial environments.

Which of the following is not an example of predation? a. A blue whale feeding on zooplankton b. A tree obtaining nutrients from the soil c. A caterpillar eating the leaves of a tree d. A wolf eating a deer Please select the best answer from the choices provided

Which of the following is a possible reason for migration?a.microevolutionb.diminished food supplyc.increased ecosystem stabilityd.macroevolution

Which of the following is a possible long-term consequence of two organisms occupying the same niche?a.Local extinctionb.Cooperationc.Interbreedingd.Coexistence

Bees obtain food they need from flowers. The flowers benefit by having their pollen dispersed by the bees as they travel from flower to flower. What type of symbiotic relationship is this?a.Commensalismb.Mutualismc.Parasitismd.Predation

Consider the following food chain:Garden plants are eaten by snails, which are eaten by birds, which are eaten by the household cat.

Which of the following is a man-made aquatic habitat?a.lakeb.reservoirc.streamd.pond

Given that water serves as an environmental thermoregulator, which of the following biomes would you expect to have the most stable temperatures?a.temperate forestb.grasslandc.rainforestd.aquatic

Algae uses all the energy in sunlight to perform photosynthesis.

Which of the following are not abiotic factors of an ecosystem?a.water abundanceb.temperaturec.day lengthd.herbivores

If a stationary body of water has a constant temperature from top to bottom it is most likely a(n) _______.a.lakeb.pondc.oceand.lagoon

When gaining biodiversity, _____________ occurs when a new resource is introduced to a species and individual members of that species begin to specialize in the resources that are available. a. geographical isolation b. polyploidy c. bottlenecking d. competition Please select the best answer from the choices provided

The four essential elements for life are _______. a. carbon, hydrogen, oxygen and nitrogen b. carbon, hydrogen, oxygen and iron c. carbon, nitrogen, oxygen and magnesium d. iron, nitrogen, oxygen and magnesium Please select the best answer from the choices provided

Less than 0.1% of the energy in a food chain generally makes it from the sun to decomposers.

Calcium and phosphorus are both essential for the proper growth of _______.a.bonesb.hairc.fingernailsd.all of the above

The water hyacinth is an invasive species that can spread extremely fast, blanketing a water surface in a very short period of time. It can limit boat traffic, swimming, and fishing, and it can deprive native plants and animals of sunlight and oxygen, thus reducing the local biodiversity. This situation demonstrates _______.a.how migratory patterns change in response to alterations in an ecosystemb.the effects of symbiosisc.the effects of local evolution or migration on an ecosystemd.how changes in biodiversity impact an ecosystem