Arthropods and Marine Biology Concepts

The video introduces marine biology students to the diversity of arthropods, focusing on their characteristics such as jointed appendages and chitin exoskeletons. It highlights the dominance of crustaceans in marine environments, detailing their unique features and roles. The video also covers horseshoe crabs and sea spiders, explaining their distinct traits and evolutionary history. The rarity of marine insects is discussed, concluding with a teaser for the next topic.

What percentage of all animal species on Earth are arthropods?

• 60%

• 75%

• 50%

• 80%

What is the primary material that makes up the exoskeleton of arthropods?

• Keratin

• Silica

• Chitin

• Calcium

Which of the following is a defining feature of crustaceans?

• No antennae

• Three pairs of antennae

• Two pairs of antennae

• One pair of antennae

What is the term for the fused head and thorax found in many crustaceans?

• Exoskeleton

• Abdomen

• Cephalothorax

• Carapace

Which marine arthropod was once thought to be a mollusc due to its external anatomy?

• Shrimp

• Crab

• Barnacle

• Lobster

Horseshoe crabs belong to which class?

• Insecta

• Crustacea

• Merostomata

• Arachnida

Where are horseshoe crabs commonly found?

• Atlantic coast

• Pacific coast

• Indian Ocean

• Arctic Ocean

What is a unique feature of sea spiders?

• They are herbivores

• They have a proboscis

• They live in freshwater

• They have wings

Why are there few insects in the ocean?

• They cannot swim

• They are preyed upon by fish

• They lack gills

• They cannot tolerate being submerged

What is the next topic hinted at the end of the video?

• Unique mouth shapes

• Different types of fish

• Deep-sea creatures

• Coral reefs