Q1: Most of the biomass of benthic animals is found in coastal zones of the ocea

Question

Q1: Most of the biomass of benthic animals is found in coastal zones of the ocean because _____.

a. water is warmest there

b. water pressure is low

c. primary production tends to be greatest there

d. predation is low

Q2: Increasing concentration of CO2 (carbon dioxide) in the atmosphere is a concern for marine organisms because ________

a. it can lead to asphyxiation of marine mammals.

b. it will decrease the density of seawater and make it more difficult for planktonic organisms to stay suspended.

c. it will interfere with vision.

d. it may lead to warming and lower pH of seawater.

Q3: Natural causes of climate change include all of the following EXCEPT:

a. changes in the tilt of Earth’s axis of rotation.

b. changes in shape of Earth’s orbit around the sun.

c. massive volcanic eruptions.

d. supernova explosions

Explanation / Answer

1. A. Benthic animals need places with warm temperatures to survive and hence they live in the coastal zones of the ocean.

2. D. Increased concentrations of carbon dioxide will react ith the water and increase it acidification. Which means the pH values get decreased and as a result the water gets warmed up and this leads to the death of organisms.

3. D. Super Nova explosion is not a natural cause for the climate change on the earth.

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