Marine Biology Final part 2

Question 1

When a limpet seals itself tightly against a rock, what is it primarily trying to prevent?

Accepted Answer

Desiccation

Question 2

What is a point of disagreement among scientists about the formation of estuaries?

Accepted Answer

How many ice ages occurred

Question 3

Which type of common mangrove has salt glands to help remove excess salt?

Accepted Answer

White

Question 4

On a sunny day, what will most likely happen to the temperature and salinity in a tide pool during low tide?

Accepted Answer

Temperature and salinity will both increase

Question 5

Why does salinity increase in a tide pool on a hot, sunny day during low tide?

Accepted Answer

Evaporation removes water, leaving salt behind

Question 6

What causes the difference in salinity between the right and left sides of estuaries in different hemispheres?

Accepted Answer

Earth's rotation and ocean gyres

Question 7

Which type of feeder is more common in muddy intertidal areas like mudflats?

Accepted Answer

Deposit feeders

Question 8

If a zone in the rocky intertidal has high biodiversity, which zone is it most likely?

Accepted Answer

Lower intertidal

Question 9

If a coral has spicules, what type of coral is it?

Accepted Answer

Soft Coral

Question 10

According to most scientists, when were most estuaries formed?

Accepted Answer

During the Ice Age

Question 11

Do organisms in the lower intertidal zone have an easier or harder time feeding than those in the upper zone?

Accepted Answer

Easier time, because they are covered by water more often

Question 12

As the tide rises in an estuary, how does the salinity experienced by a sessile organism typically change?

Accepted Answer

It increases

Question 13

In addition to warm water, what two conditions are necessary for optimum coral growth?

Accepted Answer

Hard substrate and sunlight

Question 14

In a coral community, what is the thin layer of tissue that connects individual polyps called?

Accepted Answer

Coenosarc

Question 15

What type of environmental change does a sessile organism in an estuary regularly experience?

Accepted Answer

Salinity fluctuations with changing tides

Question 16

What are byssal threads used for?

Accepted Answer

Attaching to surfaces

Question 17

Which marine organism is known for producing byssal threads?

Accepted Answer

Mussel

Question 18

A benthic organism is always underwater and never exposed to light. Where does it most likely live?

Accepted Answer

outer shelf

Question 19

What type of factors primarily determine the upper limit of living space for intertidal organisms?

Accepted Answer

Abiotic factors like temperature and moisture

Question 20

Where should you look for the greatest variety of organisms in a muddy intertidal area?

Accepted Answer

Near the surface of the mud

Question 21

What is a key feeding advantage for marine organisms living in the lower intertidal zone?

Accepted Answer

More consistent access to waterborne food

Question 22

Which of the following best explains why nitrogen gas levels decrease when nitrogen-fixing bacteria are present?

Accepted Answer

The bacteria convert nitrogen gas into forms usable by organisms

Question 23

If a scientist is studying a wetland with a mangrove forest, what type of climate is the area most likely in?

Accepted Answer

tropical

Question 24

Which process releases carbon dioxide into the water as organic material breaks down?

Accepted Answer

Decomposition

Question 25

In which hemisphere is an estuary located if the right side of the river has higher salinity?

Accepted Answer

Southern

Question 26

What does the term "desiccation" mean?

Accepted Answer

Drying out due to loss of moisture

Question 27

Which type of organism is best adapted to survive in all areas of an estuary?

Accepted Answer

Freshwater- only

Question 28

What makes the deeper layers of muddy intertidal zones less habitable for many organisms?

Accepted Answer

Anaerobic conditions due to poor water flow

Question 29

Why is the radioactive carbon technique preferred over the light and dark bottle technique?

Accepted Answer

It provides more precise and direct measurements of carbon uptake

Marine Biology Final part 2

Questions 29

Marine Biology Final part 2

Questions 29