Marine Science Final Exam Study Guide

Estuaries and wetlands serve benefits to both humans and animals. Which of the following is a benefit to humans and a benefit to animals provided by estuaries and wetlands?

• They provide recreational areas for humans and habitats for animals.

• They increase pollution for humans and reduce food for animals.

• They decrease water quality for humans and destroy habitats for animals.

• They provide no benefits to either humans or animals.

What are some common characteristics that all fish share?

• They have feathers and lay eggs.

• They have scales, gills, and live in water.

• They have fur and give birth to live young.

• They have wings and can fly.

All sharks share which of the following characteristics?

• They have cartilage instead of bone.

• They have bones instead of cartiledge.

• They are all herbivores.

• They all have an operculum

All echinoderms share which of the following common characteristics?

• Radial symmetry as adults and a water vascular system

• bilateral symmetry

• Jointed appendages

• An exoskeleton that they molt to grow.

All invertebrates share which of the following characteristics?

• They have a backbone

• They lack a backbone

• They have wings

• They produce milk

All arthropods share which of the following characteristics?

• Backbone and scales

• Segmented bodies and exoskeleton

• Soft bodies and tentacles

• Fins and gills

Saltwater is salty because:

• it contains dissolved salts, mainly sodium chloride.

• it is exposed to sunlight.

• it is colder than freshwater.

• it is found in oceans only.

The importance of marine ecosystems for the world includes which of the following?

• They provide food, oxygen, and livelihoods for humans and support biodiversity.

• They only serve as recreational areas for humans.

• They are important only for fish species.

• They have no significant impact on the environment.

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Some of the biggest threats to coral reef ecosystems are:

• Overfishing, pollution, and climate change

• Decreased tourism and coral farming

• Abundant fish populations and clean water

• Low water temperatures and lack of sunlight

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The deepest part of the ocean is known as:

• Mariana Trench

• Tonga Trench

• Puerto Rico Trench

• Java Trench