The quantity of available nutrients ____________- from the lower levels ofthe energy pyramid to the higher ones.a. increases b. decreases c. remains stable d. cycles
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The quantity of available nutrients ____________- from the lower levels of
the energy pyramid to the higher ones.
a. increases
b. decreases
c. remains stable
d. cycles
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- Read each questions and their corresponding choices carefully. Write the correct answer. 1A food web is_____food chains. A.composed of B. An energetic C. A simple D. A decaying 2. In the food web, which of following receives the greatest amount of energy? A.Primary consumers B.Tertiary consumers C.Secondary consumers D.Decompose 3. What happens to the stored energy as the consumer is getting away from the producer? A. It Increases B. It does not change C. It decreases D. It remains the same.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 futureFor carnivores and insectivores, the water content of food is high, but for plant feeders, it is(a) Very low (b) Marginally low (c) Very high (d) Marginally high (e) Extremely variable
- Greenhouse gases function by (a) blocking sunlight but letting out heat from Earth to outer space. (b) absorbing heat that radiates from Earth that would otherwise escape to outer space. (c) absorbing heat that radiates from the sun toward Earth. (d) releasing heat that radiates from Earth into outer space.Living organisms play an important role in the recycling of many elements within an ecosystem. Discuss how various types of organisms and their biochemical reactions contribute to the recycling of either carbon or nitrogen in an ecosystem. Include in your answer one way in which human activity has an impact on the nutrient cycle you have chosen.The recent increase in atmospheric CO2 concentration is mainly a result of an increase in a. plant growth. b. the absorption of heat radiating from Earth. c. the burning of fossil fuels and wood. d. cellular respiration by the increasing human population.
- 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 productionThelargest reservoir of phosphorus in most ecosystems is phosphorus:a. inthe atmosphere.b.dissolved in water.c. inrocks and sediments.d.bound in animal tissues.e.bound in plant tissues.A producer creates 1000 grams of carbohydrates. According to the 10% rule of energy transfer, how much of the original 1000 grams of carbohydrates would be lost as heat by a secondary consumer? A. 9 grams B. 80 grams C. 100 grams D. 110 grams
- Which essential chemical must be “fixed” by soil-dwelling bacteria before it can enter the food chain? a. Carbon b. Nitrogen c. Phosphorous d. Both a. and b.Answer the following: a. What is a nutrient cycle? b. What are the different types of nutrient cycles, and describe each briefly. c. What is the importance of the different nutrient cycles on Earth?Adding high levels of nutrients to a lake or inshore area wouldhave all of the following effects in that environment excepta) death of clams and crabs.b) increased growth of heterotrophic microbes.c) increased growth of photosynthetic organisms.d) increased levels of dissolved O2 .
