Arachnids: Spiders, Ticks, and Scorpions

The video lecture covers the classification and characteristics of chelicerates, including horseshoe crabs, spiders, scorpions, ticks, and mites. It explains their feeding habits, anatomy, and ecological roles. The lecture highlights the unique features of each group, such as the venomous fangs of spiders and the stingers of scorpions. It also discusses the parasitic nature of ticks and mites, emphasizing their impact on various hosts.

Which of the following is NOT classified as a chelicerate?

• Lobster

• Sea spider

• True spider

• Horseshoe crab

What is unique about the vision of jumping spiders?

• They have night vision

• They have binocular vision

• They can see ultraviolet light

• They have 360-degree vision

How many body segments do spiders have?

• Three

• Four

• Two

• One

What is the primary function of a spider's chelicerae?

• To attract mates

• To spin webs

• To inject venom

• To sense vibrations

What distinguishes scorpions from spiders in terms of venom delivery?

• Scorpions use their fangs

• Scorpions use their pincers

• Scorpions use their stinger

• Scorpions use their legs

Where are scorpions most commonly found?

• Tropical and subtropical areas

• Mountainous regions

• Arctic regions

• Urban areas

What is a common misconception about ticks and mites?

• They are herbivores

• They are insects

• They have wings

• They are aquatic

What do dust mites primarily feed on?

• Fungi

• Dead skin cells

• Other mites

• Plant matter

How do ticks typically find a host?

• By jumping

• By flying

• By swimming

• By crawling

What is the primary diet of ticks?

• Blood

• Fungi

• Plant sap

• Insects