Not logged in? Join one of the busiest Cancer Forums on the Internet! Join Now!   Latest blog post: New Biomarker Discovered for Breast Cancer

Advertisments:



Useful Links:

American Cancer Society
National Cancer Institute
Cancer Definition

Please Help Me !! I'm Stuck !?

Cancer Prevention discussion, cancer prevention diets, environmental causes of Cancer and more.

Please Help Me !! I'm Stuck !?

Postby jarret » Thu Aug 09, 2012 11:01 am

Marine science help pleaseeeeeee !

Question 1 (Multiple Choice Worth 5 points)

What is the role of krill in the Antarctic food web?

have little impact on the survival of species in Antarctica

control only the population of phytoplankton in Antarctica

only affect the population of organisms that feed on krill

have a strong impact on the survival of most organisms in Antarctica



--------------------------------------…



Question 2 (Multiple Choice Worth 5 points)

Fish such as Needlefish, Tuna, Mackerel and Anchovies are in what class of fish?

Agnatha

Chondrichthyes

Osteichthyes

Chimera



--------------------------------------…



Question 3 (Multiple Choice Worth 5 points)

Which of the following change in sea surface temperature best describes an El Nino event?

waters in the eastern Pacific steadily get warmer

waters in the eastern Pacific steadily get cooler

waters in the eastern Pacific show no change in temperature

Waters in the eastern Pacific fluctuate daily in temperature



--------------------------------------…



Question 4 (Multiple Choice Worth 5 points)

The theory that all continents were once a super continent (Pangea) and that those continents broke apart over time best describes the theory of

plate tectonics

plate drift

continental drift

continental movement



--------------------------------------…



Question 5 (Multiple Choice Worth 5 points)

On the following diagram what part of a wave is shown by letter C?



wavelength

trough

crest

fetch



--------------------------------------…



Question 6 (Multiple Choice Worth 5 points)

Estuaries are highly productive bodies of water. Which of the following best explains the reason for this high productivity?

constant changes in salinity

act as a buffer for flooding

provide a habitat for many organisms

act as a filter for nutrients



--------------------------------------…



Question 7 (Multiple Choice Worth 5 points)

While conducting random water sampling tests from a nearby estuary you measure higher than normal ammonia levels. You also measure an increase in nitrogen-fixing bacteria and blue green algae in the water. Which of the following best explains why this is a good thing?

will lead to an increase in marine organisms

bacteria and blue-green algae convert ammonia into usable nitrogen

will provide evidence that the water is unhealthy

ammonia increases the productivity of an ecosystem



--------------------------------------…



Question 8 (Multiple Choice Worth 5 points)

Why are most of the world's coral reefs found between the Tropic of Cancer and the Tropic of Capricorn?

warm temperatures

high nutrient levels from runoff

fluctuating salinity levels

little wave action



--------------------------------------…



Question 9 (Multiple Choice Worth 5 points)

Antarctica traps 70% of the world's fresh water in its ice. Which type of ice contains only saltwater?

land ice

sea ice

continental ice

glacial ice



--------------------------------------…



Question 10 (Multiple Choice Worth 5 points)

Deep water currents are caused by ______________________

wind

Earth's rotation

animal movement

changes in salinity



--------------------------------------…



Question 11 (Multiple Choice Worth 5 points)

Coral building organisms obtain some of their nutrients by filter feeding phytoplankton and nutrients from the water. Most of their nutrients come from the ____________________ which lives in the coral.

zanthanon

zooxanthellae

zooplankton

polyps



--------------------------------------…



Question 12 (Multiple Choice Worth 5 points)

Birds that can fly usually have hollow, lightweight bones. Penguins, a species of flightless bird, have heavy and dense bones. Why is this an advantage?

they are less likely to be injured on the ice

their bones help them retain body heat in the cold temperatures

they are more efficient hunters in the water due to heavier bones

they are more efficient hunters on land due to heavier bones



--------------------------------------…



Question 13 (Multiple Choice Worth 5 points)

Emperor penguins lay their eggs during the coldes
jarret
 
Posts: 667
Joined: Mon Dec 12, 2011 1:59 am

Please Help Me !! I'm Stuck !?

Postby conor » Thu Aug 09, 2012 11:11 am

Just Google the main statements.
I did #1

http://www.google.ca/search?sourceid=navclient&aq=hts&oq=&ie=UTF-8&rlz=1T4GGLS_enCA478CA478&q=What+is+the+role+of+krill+in+the+Antarctic+food+web%3f
conor
 
Posts: 1043
Joined: Thu Mar 31, 2011 3:58 pm


Return to Cancer Prevention

 


  • Related topics
    Replies
    Views
    Last post