Forest trees have trunks, branches, and big roots, contributing to large amounts of total biomass. Grasslands have comparatively less biomass, but have a larger net primary production than that of forests. Why is this so? A. Less respiration is needed in the forest habitat B. More biomass is added in a grassland in the same time as that of forests C. The number of consumers within the forest is greater D. Solar energy is converted to chemical energy at a much higher rate in forests

Forest trees have trunks, branches, and big roots, contributing to large amounts of total biomass. Grasslands have comparatively less biomass, but have a larger net primary production than that of forests. Why is this so? A. Less respiration is needed in the forest habitat B. More biomass is added in a grassland in the same time as that of forests C. The number of consumers within the forest is greater D. Solar energy is converted to chemical energy at a much higher rate in forests

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter42: Ecosystems

Section: Chapter Questions

Problem 4SA: Primary productivity on land is affected by _______. a. nutrient availability c. temperature b....

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The total amount of energy taken up by producers through photosynthesis in an ecosystem is known as...? Group of answer choices a. evaporation b. net primary production c. standing crop d. nutrient limitation e. gross primary production
Netprimary productivity is the primary productivity of an ecosystem, aftersubtracting energy lost in:a.dead plant tissues.b.inedible plant tissues.c.respiration by primary producers.d.respiration by primary consumers.e.inefficiencies of photosynthesis.
Which of the following statements about gross primary production (GPP) is FALSE? O It is a rate that can be positive or negative Some forests (e.g. temperate forests) become carbon sources in the winter because GPP is less than respiration One method to estimate GPP is to monitor the change in CO, concentration, because CO2 is consumed during photosynthesis O It is the amount of photosynthesis per unit time O It is the amount of solar energy converted into chemical energy per unit time
In a cap and trade program, the ‘cap’ refers to what? a. the maximum amount of fossil fuel emissions that can be released in total b. the maximum amount of money that a company can make when selling fossil fuels c. the maximum amount of fossil fuel emissions that can be released by an individual d. the maximum amount of money an energy provider can charge for their product
Approximately how much of the energy taken in by a consumer is used to make more biomass? Group of answer choices a. 80% b. 100% c. 60% d. 0% e. 10%
As a general rule, how much energy is lost in the transmission of energy from one trophic level to the one immediately above it? a. 1% b. 10% c. 90% d. 50%
Gross primary productivity refers to the total a. energy used by the heterotrophs of the ecosystem in a given period of time energy captured initially by the producers OC.quantity of solar energy reaching a given area of the ecosystem O d.quantity of solar energy available to the ecosystem in a given period of time e. energy used by the producers for their growth and reproduction b.
Nitrogen availability is a limiting factor in crop production. * D. Disagree, because atmospheric nitrogen is about 80% and therefore nitrogen is readily available. A. Agree, because almost 80% of the atmospheric nitrogen (N2) is readily available. C. Agree, because atmospheric nitrogen must first be reduced to ammonia through N-fixation. B. Disagree, because only a small fraction of the atmosphere is composed of nitrogen gas.
92% of the energy produced in the United States is from this source of energy. A. non-depletable B. non-renewable C. renewable
During photosynthesis, carbon in the atmosphere (in the form of CO2) is transferred to plants, where it is turned into organic plant biomass. Some of the carbon also enters the soil, and some is returned to the atmosphere through respiration. Which parts of this interaction would be considered pools, and which would be fluxes? a. The atmosphere, plants, and soil are pools; the movements between them are fluxes. O b. The movements between atmosphere, plants, and soil are pools; the atmosphere, plants, and soil are fluxes. С. The atmosphere is a pool; the plants and soil are fluxes. O d. The atmosphere and plants are pools; the soil is a flux.
What are additional benefits of switching to climate safe energy sources apart from reducing greenhouse gas emissions? Select all that apply: a. reducing air pollution b. reducing nuclear waste risks c. reducing the amount of natural land utilized d. securing energy resources for the future
If the gross primary productivity is 100 g/m2/year and the respiration rate is 37 g/m2/year what is the net primary productivity? Group of answer choices a. 37 g/m2/year b. can’t tell from the information given c. 50 g/m2/year d. 63 g/m2/year e. 25 g/m2/year