Campbell Essential Biology with Physiology (6th Edition)
6th Edition
ISBN: 9780134711751
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 20, Problem 5SQ
Why are the top predators in food chains most severely affected by pesticides such as DDT?
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Why do the top predators in the food web receive the least amount of energy from the animals they eat?
At which point in the trophic pyramid is the greatest arount (not percentage) of energy lost?
A) Between the primary producers and the primary consumers
B) Between the primary consumers and the secondary consumers
C)Between the secondary consumers and the tertiary consumers
D) Between the secondary consumers and the primary producers
A Food Web
om
Eage
Pythan
Wolf
Rat
Dragonfly
Thrush
Frog
Butterfly
Fruit Fly
Grasshopper
Mangoes
Corn
A Flowering Plant
Lavenders
Look at the food web above to answer the following questions.
1. Which organisms are the producers in this food web?
2. Which organism is an example of a primary consumer?
3. Which organism is an example of a tertiary consumer?
Chapter 20 Solutions
Campbell Essential Biology with Physiology (6th Edition)
Ch. 20 - Prob. 1SQCh. 20 - According to the concept of competitive exclusion,...Ch. 20 - Prob. 3SQCh. 20 - Prob. 4SQCh. 20 - Why are the top predators in food chains most...Ch. 20 - Over a period of many years, grass grows on a sand...Ch. 20 - Prob. 7SQCh. 20 - Local conditions, such as heavy rainfall or the...Ch. 20 - Prob. 9SQCh. 20 - Prob. 10SQ
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- 3) Below is a simple food chain that represents the food chain in Yellowstone National Park in the Western Region of the United States. Use this image to help you answer the questions below a) Why are so few apex predators supported in this food chain compared to the number of producers or primary consumers? b) If someone accidently introduced a poison like DDT into this food chain what type of effects would you expect to see to happen to animals higher in the food chain over animals that are on the lower end of the food chain? c) Wolves although at the top of the food chain, are important in controlling this entire system. What type of species is that called and why are they so important?arrow_forwardWho acts as "nature's scavengers"?arrow_forwardWhat are some advantages of being part of a food web rather than a food chain?arrow_forward
- In a simple food chain, a frog eats insects, and a snake eats the frog. The primary role of the frog in the food chain is _____________________. a) to be a source of energy b) to find a space to live c) to start a new species d) to make an ecosystemarrow_forwardWhich organisms in this food web would be strictly classified as primary consumers?arrow_forwardIn any ecosystem, there are less top level predators then there are primary producers. Describe why this occurs in every ecosystem.arrow_forward
- SEAWEED ORCA SQUID MACKEREL HUMAN TUNA RED ALGAE PHYTOPLANKTON MILYFISH Using the food web to the left, complete the following: Name two primary producers: What are the two apex predators? In the space provided, create a food chain that contains 4 organisms:arrow_forwardName the apex consumers in the food web shown here.arrow_forwardWhich of the following is an environmental factor that leads to food insecurity? a) Poverty b) Climate change c) War and conflict d) Agricultural practicesarrow_forward
- What role do predators play in an ecosystem?arrow_forwardThe bluestreak cleaner wrasse is a fish that inhabits coral reefs. These fish eat parasites off of larger fish. The larger fish benefit from increased health. In return, the wrasse receive nutrition and protection from the larger fish. What type of interaction is this? a) Predation b) Mutualism c) Parasitism d) Commensalismarrow_forwardChoose all of the negative environmental consequences of human population growth A) increased deforestation B) increase habitat loss C) fewer extinction D) increased air pollution E) decreased need for mining F) decrease in water pollution G) increased loss of fertile top soil H) increased use of fertilizer for agriculturalarrow_forward
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