Invertebrate

The video tutorial explores the world of invertebrates, animals without a backbone or internal skeleton. It covers various groups such as mollusks, annelids, insects, crustaceans, arachnids, and protozoa, highlighting their unique characteristics and protective adaptations. The tutorial also compares invertebrates with vertebrates, emphasizing the diversity and prevalence of invertebrates in the animal kingdom. Viewers are encouraged to reflect on the different protective adaptations developed by invertebrates.

Which of the following is a characteristic of mollusks?

• They have a backbone.

• They have an exoskeleton.

• They live only on land.

• They can live in water and some on land.

What is the primary function of an insect's exoskeleton?

• To help them fly.

• To provide protection and support.

• To make them invisible.

• To help them swim.

Which group of invertebrates includes sea anemones?

• Annelids

• Mollusks

• Echinoderms

• Without tasks

What distinguishes arachnids from other invertebrates?

• They have 8 legs and an exoskeleton.

• They are single-celled organisms.

• They have an internal skeleton.

• They have 6 legs.

What percentage of all animal species on Earth are invertebrates?

• 2%

• 75%

• 50%

• 98%