BIO 1302 UNIT 3

JOURNAL

Consider humanity as the ultimate predator. Many if not most of us, particularly in the United States, are quite comfortable with the harvesting of organisms like tuna, deer, ducks, or rabbits. Other countries and cultures, however, value species that rarely, if ever, find their way to the North American dinner plate. What are your thoughts on the harvesting of organisms such as whales, dolphins, seals, etc.? Is hunting the only major issue that might threaten the existence of these organisms? Should we limit ourselves to eating only certain organisms? Why, or why not? In what ways are you selective about the foods you eat?

Your journal entry must be at least 200 words. No references or citations are necessary.

UNIT 3 QUIZ

Question 1

With __________, one species may negatively affect another, but will not be affected positively or negatively.

amensalism

commensalism

mutualism

parasitism

Question 2

Acorn barnacles attach to marine turtle shells where they live as adults, filter feeding plankton from the water as their host animal swims. There is no adverse effect on the turtle and the turtle gains no benefit from the barnacle. This is an example of:

commensalism.

parasitism.

amensalism.

mutualism.

Question 3

Vultures feed largely on carrion (dead animals). Their role in the ecosystem is largely as that of a ___________.

predator

true predator

scavenger

parasite

Question 4

Penicillium (the source of the antibiotic penicillin) is a mold that secretes a toxin that kills bacteria and other organisms. Penicillium, however, is not harmed by this toxin. This is an example of:

predator-prey.

commensalism.

mutualism.

amensalism

Question 5

Atlantic cod populations began their steep decline in the:

1950s.

1960s.

1970s.

1980s.

Question 6

Match the organisms to the relationship.

orchid / tree

coyote / rabbit

yucca moth / soapweed yucca

cowbird / warbler

tapeworm / human

A.

brood parasitism

B.

amensalism

C.

parasite

D.

mutualism

E.

commensalism

F.

predator-prey

Question 7

Pick the phrase that best matches each term

Heterotrophic

Autotrophic

Producers

Primary consumers

Secondary consumers

A.

organisms that feed on other organisms

B.

organisms that eat plants (herbivores)

C.

organisms at the base of the food web, autotrophs

D.

two species that feed on the same prey organism

E.

organisms that feed on herbivores (carnivores)

F.

self-feeding organisms, photosynthetic

UNIT 3 HOMEWORK

  • Introduction

In the Unit III Lesson, you learned about the overfishing and decline of the Atlantic Cod off the coast of Nova Scotia. Other populations of fish around the world have been affected in much the same way. This activity will help you explore which species are imperiled by current fishing practices and which are, for now, a relatively sustainable choice for the table.

Materials

For this assignment, you will need a computer with Internet access.

Part I

Click the following link: http://www.seafoodwatch.org

Under “Ocean Issues,” click “Wild Seafood.”

Read each tab (i.e., Wild Seafood Home, Overfishing, Illegal Fishing, Bycatch, Habitat Damage, and Management).

Answer the questions in Blackboard using your own words and in complete sentences.

Part II

Click the following link: http://www.seafoodwatch.org/ocean-issues/aquacultu…

Read each tab under Aquaculture (i.e., Aquaculture Home, Wild Fish, Pollution & Disease, Escapes, Habitat Damage, and Management).

Answer the questions in Blackboard using your own words and in complete sentences.

Part III

Click the following link: http://www.seafoodwatch.org/ocean-issues/fishing-a…

Watch the videos and/or read the captions to learn about the different ways in which seafood is harvested. For some methods, there will be a video; for others, there will just be an image and a caption.

Answer the questions in Blackboard using your own words and in complete sentences.

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