Problem 12 - Campbell Biology Concepts & Connections

Question

Match each description on the left with the corresponding term on the right. a. annelids b. nematodes c. sponges d. arthropods e. flatworms f. cnidarians g. molluscs h. echinoderms i. chordates Earthworms and leeches

Step-by-Step Solution

Answer

a. annelids

Step 1: Identify the Description

The description provided is 'Earthworms and leeches.'

Step 2: Recall the Characteristics

Recall that earthworms and leeches are segmented worms known for their ring-like segments. Both belong to the phylum Annelida.

Step 3: Match the Term

Match the description 'Earthworms and leeches' with the term that identifies segmented worms. The correct term is 'annelids'.

Key Concepts

Earthworms

Earthworms are fascinating creatures often seen wriggling through soil after rain. They play a crucial role in the ecosystem by aerating the soil, which helps plants grow. These creatures belong to the phylum Annelida, known for their segmented bodies. Each segment contains a repetition of organs, which helps in movement and flexibility. Earthworms also have a simple nervous system and no lungs; they breathe through their skin. You'll often find them in moist environments as they need moisture to survive.

Annelids

Annelids are a diverse group of worms characterized by their segmented bodies. This phylum includes earthworms, leeches, and marine worms. Segmentation is crucial as it allows these animals to move efficiently. Each segment functions somewhat independently, which provides flexibility and resilience. Annelids have a closed circulatory system, meaning their blood is enclosed within vessels. They also usually have bristles called setae, which help in movement.

Biology education

Biology education involves understanding the vast diversity of life on Earth. Learning about different animal phyla, like annelids, helps us appreciate the complexity and interdependence of ecosystems. It also fosters critical thinking skills and a deeper understanding of environmental issues. Hands-on activities, such as observing earthworms in soil, can make learning more engaging and effective. Incorporating various teaching methods ensures a comprehensive understanding of biological concepts for students.