Marine Life Quiz

What are the characteristics of vertebrates?

• Having complete nerve net that reacts to external stimuli.

• Having a skeleton, backbone, skull, and brain

• Having a flexible connective tissue composed of cells and protein

• Having mammary glands and producing milk

What is the main difference between Chondrichthyes and Osteichthyes fish?

• Chondrichthyes have a skeleton made of cartilage, while Osteichthyes have a skeleton made of bone

• Chondrichthyes have scales to protect their soft bodies, while Osteichthyes do not

• Chondrichthyes fish reproduce sexually, while Osteichthyes reproduce asexually

• Chondrichthyes live in freshwater environments, while Osteichthyes live in marine environments

Which type of fish is considered the first jawed fish?

• Cartilaginous fish

• Bony fish

• Mammals

• Invertebrates

What is the purpose of mucus coating on fish scales?

• Acts as a barrier against infection

• Reduces friction (drag) allowing the fish to swim more efficiently

• Provides camouflage in the marine environment

• Helps the fish breathe underwater

Which group of marine mammals belong to the order Cetacea?

• Whales

• Dolphins

• Sea otters

• Seals and sea lions

What do baleen whales primarily feed on?

• Plankton and small fish

• Seals and penguins

• Squid and octopus

• Seaweed and kelp

How do toothed whales catch their prey?

• Using their peg-like teeth

• Filtering water through baleen plates

• Using their long tongue to suck in prey

• Trapping prey in their tentacles

Which marine mammal is known for its extremely dense fur that traps air for insulation?

• Whales

• Dolphins

• Sea otters

• Seals and sea lions

What is the role of sea otters as a keystone species?

• Controlling sea urchin populations

• Filtering water and improving water quality

• Providing food for other marine organisms

• Creating habitats for coral reefs

What order do seals and sea lions belong to?

• Cetacea

• Carnivora

• Pinnipedia

• Cnidaria