Arthropod Classification and Characteristics

The video explores the complexity and segmentation of various animal phyla, focusing on Annelida and Arthropoda. It highlights the evolutionary significance of segmentation and synapomorphies, detailing the traits of earthworms, leeches, and arthropods. The video also covers the diversity of insects, their evolution, and metamorphosis, as well as the unique characteristics of crustaceans. It emphasizes the ecological roles and evolutionary adaptations of these organisms.

What is the estimated number of arthropods on Earth?

• 10 to the 18th power

• 10 to the 15th power

• 10 to the 12th power

• 10 to the 20th power

Which trait is considered a major step in animal complexity?

• Bilateral symmetry

• Photosynthesis

• Segmentation

• Radial symmetry

What is a synapomorphy of the Annelida phylum?

• Wings

• Segmentation

• Exoskeleton

• Jointed legs

Which class of Annelida is known for having few bristles?

• Polychaetes

• Oligochaetes

• Hirudinea

• Nematoda

What is a defining feature of arthropods?

• Photosynthetic ability

• Single-celled structure

• Segmented bodies

• Internal skeleton

Which subphylum includes spiders and scorpions?

• Hexapoda

• Myriapoda

• Crustacea

• Cheliceriformes

What is the primary diet of millipedes?

• Detritivorous

• Omnivorous

• Herbivorous

• Carnivorous

Which arthropod subphylum is known for having six legs?

• Cheliceriformes

• Myriapoda

• Hexapoda

• Crustacea

What is a unique feature of crustaceans compared to other arthropods?

• Bioluminescence

• Ability to fly

• Lack of antennae

• Simple eyes

Which process allows insects to completely change shape during development?

• Partial metamorphosis

• Complete metamorphosis

• Photosynthesis

• Respiration