A community of organisms that interact with each other and their physical environment is a(n)...
Ecosystem
How many ocean BASINS are there on earth?
4
Often called blue-green algae, but are actually bacteria that grow in large groups
Cyanobacteria
The name for animals that do not have a backbone
Invertebrate
Which living marine organism often divide their body up to produce multiple mouths?
Corals
The branch of biology that explores organisms living in or around the ocean is called...
Marine biology
Name the ocean that is NOT considered a basin?
Southern Ocean
This type of single celled algae cannot swim and is forced to float along with the water and provide a great food source for many other creatures.
Plankton
These animals are attached to a bottom substrate and cannot move, belonging to the Phylum Porifera.
Sponges
Name the branch of biology that studies the ecosystems of the world.
Ecology
Most oceanic life exists in this ocean layer
The sunlight layer or epipelagic
This type of algae are not actually plants and photosynthesize using their blades
Seaweed
This Cnidarian can exist as a medusa or a polyp
jellyfish
The study of all living things is called...
Biology
Abyssopelagic layer
This group of algae are single celled and include the greatest producers of oxygen in the world
Eukaryotic algae
Cnidarians have tentacles covered with special stinging structures called
Nematocysts
The study of the Earth and its processes is called...
Geology
Which is the first layer in which NO sunlight reaches at is located at depths of 1,00-4,000 feet?
The midnight layer or bathypelagic
This is the only true plant that is completely marine, found in the oceans.
Seagrasses
Which kind of cnidarian lives in a symbiotic relationship with specific species of fish?
Anemone