Freshwater and Marine Biomes — Unit test Answers

Which of the following adaptations helps alpine animals survive the cold winter? a. reduced lung size b. low levels of hemoglobin c. hibernation d. large legs, ears, and tails Please select the best answer from the choices provided

The arctic tundra can be found in _______.a.Greenlandb.Canadac.The United Statesd.all of the above

Which of the following changes in deciduous forests occurs in the winter?a.Trees regain their leaves.b.Trees block the flow of water and nutrients to their leaves.c.The leaves of trees begin to lose their chlorophyll.d.Trees live off of stored nutrients.

The events that lead to genetic drift are _______.a.always natural disastersb.randomc.predictabled.related to human activities

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

Lions live in groups called prides. Lion populations would most likely fall in which category of population distribution?a.even b.randomc.clumpedd.density

Vines most successfully compete for sunlight in tropical rainforests by _______.a.climbing up into the canopyb.strangling the trees they grow onc.having broader leaves that absorb more lightd.having thick, woody stems

Organisms that live in the chaparral have developed unique adaptations that aid in their survival. The California quail is a small, plump game bird with short wings that can be found in the chaparral regions of California. These birds can only fly short distances, and typically take cover in shrubs or other low-growing plants. They are active in the morning and at night. Photo by Dcrjsr How is the California quail adapted to live in the chaparral biome? a. tree-dwelling b. crepuscular activity c. nesting in trees d. moisture-rich diet Please select the best answer from the choices provided

The _______ is the total number of organisms that an ecosystem can support.a.tolerance rangeb.carrying capacityc.competitive exclusion principled.population

Which of the following adaptations does not protect tundra organisms from heat loss?a.thick furb.retention of dead leavesc.dense haird.production of chemicals to ward off insects

Which of the following did not allow researchers to further explore below the ocean’s surface?a.ROV’sb.Alvinc.Palomaresd.Bathysphere

Which of the following is a characteristic typically not used to classify biomes? a. climate b. type of vegetation c. human activity d. geography Please select the best answer from the choices provided

Why was the reduction of the bison population to under 1,000 individuals a bottleneck event for the species?a.It drastically reduced the gene pool of the species.b.It reduced the territorial range available to the species.c.Foreign genes were introduced by crossbreeding with cattle.d.It reduced the prevalence of recessive traits.

Deserts are only found near the equator.

The chaparral biome is best characterized by _______.a.large, contiguous regions of shrublandb.small regions interspersed with other biomesc.large noncontiguous regions interspersed with other biomesd.the animals dwelling in it

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

The taiga biome has three distinct seasons, while the alpine biome has only two.

Why are plants in the alpine biome typically low growing?a.They have limited access to nutrients.b.They have limited access to sunlight.c.They have too much access to water.d.The have access to nutrient-rich soil.

Which of the following is a characteristic differentiating tropical and temperate rainforests? a. the location b. the types of trees c. the average temperature d. all of the answers are correct Please select the best answer from the choices provided

There are approximately 30,000,000 white-tailed deer in the United States, which covers 3,536,000 square miles. What is the population density, rounded to the nearest whole number, for the white-tailed deer?a.2 deer per square mileb.4 deer per square milec.6 deer per square miled.8 deer per square mile