Freshwater and Marine Biomes

Which of the following typical adaptations of marine animals is not found in sea otters?
a.
streamlined body
b.
webbed hands and feet
c.
body covered in thick fur
d.
breathing apparatus on the top of the head

D.

How are kelp and seaweed similar?

Kelp and seaweed are both species of algae that live in the ocean, are anchored to rocks, and live in shallow or coastal waters.

Freshwater biomes have _______.
a.
organisms adjusted to high salinity
b.
more diversity than marine biomes
c.
a salinity of less than 1%
d.
the ability to maintain their temperature year round

C.

Which of the following is not an example of a hydrophyte?
a.
eucalyptus
b.
pond lilies
c.
cypress
d.
cattails

A

What important discovery did researchers aboard the Alvin make?

Researchers aboard Alvin discovered the presence of hydrothermal vents on the ocean floor.

What submersible craft recovered the hydrogen bomb that fell into the Mediterranean Sea during the Palomares hydrogen bomb incident?
a.
Alvin
b.
ROV
c.
H.M.S. Challenger
d.
Bathysphere

A.

Explain how a streamlined, smooth, nearly hairless body is a beneficial adaptation for marine animals.

Having a streamlined, smooth, and nearly hairless body is beneficial for marine animals, because it reduces friction on the animals as they move through the water. This enables the animals to move more quickly through the water with less effort, helping them conserve energy and more easily evade predators or capture prey.

Why are catfish and carp found at the mouth of a river, while trout are found nearer the source?

Catfish and carp require lower levels of oxygen than trout. Since the mouth of a river typically has lower levels of oxygen and the area near the source has higher levels of oxygen, catfish and carp can thrive at the mouth and trout, which require higher levels of oxygen, thrive at the source.

How has ocean exploration increased human understanding of aquatic ecosystems?

As humans have explored the oceans through time, they have been able to view aquatic organisms in their native habitats. They have been able to witness the interactions of aquatic organisms and learn more about the abiotic factors that govern these ecosystems as well.

The uppermost zone in lakes and ponds, which is close to the shore and rich in nutrients is called the _______.
a.
benthic zone
b.
limnetic zone
c.
pelagic zone
d.
littoral zone

D.