Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 59, Problem 6TY
Summary Introduction
Introduction: DDT (dichloro diphenyl trichloroethane) is an important insecticide which is used for the control of mosquito-borne malaria. DDT has various chemical properties that have an important ecological effect.
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Eutrophication in water bodies can lead to the formation of dead zones due to a depletion of
a.
oxygen.
b.
carbon.
c.
nitrogen.
d.
decomposers.
e.
phosphorus.
Of the total amount of energy that passes from one trophic level toanother, about 10% isa. respired and becomes heat.b. passed out as feces or urine.c. stored as body tissue.d. recycled to autotrophs.e. All of these are correct
The total amount of living tissue within a given trophic level is called the:
O A. Biomass
O B. Energy mass
C. Organic mass
O D. Trophic mass
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- EcosystemA hasprimary production of 1000 g C /m2/yr and ecological efficiency of 10%. Ecosystem B has primary production of 300 g C /m2/yr and an ecological efficiency of 25%. a.Which ecosystem will have more production at thesecondary consumer (carnivore) trophic level? b.Which ecosystem is more likely to support an endothermic primary consumer (herbivore)? c.If atrophic level requires at least 1 gC/m2/yr in order to exist, how many trophic levels can each of these ecosystems support?d.Given your answer to part c, which do you thinkhas a larger impact on the energy available at upper trophic levels: primary productivity or efficiency of energy movement across trophic levels?arrow_forwarda. What factors cause energy to decrease with each trophic level?b. How is it possible for energy to be lost and the ecosystem to stillrun efficiently?c. Are the nutrients on the earth a renewable resource? Why or why not?arrow_forwardorder the components to show how energy matter cycle through the kingfishers ecosystemarrow_forward
- An ecosystem thrives with biotic and abiotic component parts. An example of an abiotic part of an ecosystem is ... a.minerals b.fungus c.decaying plants d.micro-bacteriaarrow_forwardThe number of trophic levels an ecosystem can support is driven by… (select all that apply) A- The amount of energy available (primary productivity) B- The speed of nutrient cycling (decomposition) C- The population size of top predators in the ecosystem D- The efficiency of energy transfer across trophic levels E- The composition of the plant communityarrow_forwardThe number of carnivores found at the top of an ecological pyramid is limited by thea. number of organisms above the top carnivores.b. number of trophic levels below the producers.c. biomass of the decomposers.d. amount of energy transferred to the top carnivores.arrow_forward
- 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%arrow_forwardOligotrophic lakes have a. low oxygen, and high nutrient availability. b. high oxygen, and high nutrient availability. c. high oxygen, and low nutrient availability. d. low oxygen, and low nutrient availability.arrow_forwardWhich of the following would not be included in a description of an organism’s niche? a. its trophic level b. the humidity and temperature it prefers c. when it reproduces d. its number of chromosomesarrow_forward
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