Annelidos Flashcards
(27 cards)
What are annelids commonly known as?
Segmented worms.
True or False: Annelids have a true coelom.
True.
What is the basic body structure of annelids?
They have a segmented body divided into metameres.
Fill in the blank: Annelids exhibit __________ symmetry.
Bilateral.
Which type of circulatory system do annelids possess?
Closed circulatory system.
What is the primary method of locomotion in annelids?
Using setae and muscular contractions.
True or False: Annelids reproduce only asexually.
False.
What are the two main types of reproduction in annelids?
Asexual and sexual reproduction.
In annelids, what is the function of the clitellum?
It secretes a mucus ring for egg deposition.
What is the larval stage of annelids called?
Trochophore.
Fill in the blank: Annelids are divided into three main groups: __________, __________, and __________.
Oligochaeta, Polychaeta, Hirudinea.
Which group of annelids is commonly known as earthworms?
Oligochaeta.
What is a key characteristic of Polychaeta?
They have parapodia and are mostly marine.
True or False: Hirudinea includes leeches.
True.
What is the primary role of setae in annelids?
To aid in movement and anchorage.
Fill in the blank: Annelids possess a __________ system for excretion.
Nephridial.
What is the digestive tract of annelids characterized by?
It runs the length of the body and is specialized into regions.
True or False: Annelids have a simple nervous system with a dorsal nerve cord.
True.
What is the primary function of the annelid’s circulatory system?
To transport nutrients and gases.
Which annelid group is known for having well-developed sensory organs?
Polychaeta.
Fill in the blank: The life cycle of annelids often includes a free-swimming __________ stage.
Trochophore.
What type of habitat do most annelids prefer?
Aquatic or moist soil environments.
True or False: Annelids are exclusively marine organisms.
False.
What adaptations do annelids have for their environment?
Moist skin for respiration and segmentation for movement.
