Biology Chapter 28 Invertebrates Quiz

Questions and Answers

Which of the following statements is false?

Choanocytes have flagella that propel water through the body.

Porocytes control the flow of water through pores in the sponge body.

Lophocytes secrete collagen.

Pinacocytes can transform into any cell type. (correct)

Which of the following statements about the anatomy of a mollusk is false?

The digestive system includes a gizzard, a stomach, a digestive gland, and the intestine.

Which of the following statements about insects is false?

The trachea is part of the digestive system.

Mesohyl contains:

a collagen-like gel and suspended cells for various functions Signup and view all the answers

The large central opening in the parazoan body is called the:

osculum Signup and view all the answers

What is a key limitation of sponge body plans?

The reliance on osmosis/diffusion requires a design that maximizes the surface area to volume ratio of the sponge. Signup and view all the answers

Cnidocytes are found in

Phylum Cnidaria Signup and view all the answers

Cubozoans are

polymorphs Signup and view all the answers

To which class does a sessile Cnidarian that buds medusas belong?

Class Scyphozoa Signup and view all the answers

Which group of flatworms are primarily ectoparasites of fish?

monogeneans Signup and view all the answers

The rhynchocoel is a

fluid filled cavity Signup and view all the answers

Annelids have:

true coelom Signup and view all the answers

A mantle and mantle cavity are present in:

Phylum Mollusca Signup and view all the answers

How does segmentation enhance annelid locomotion?

Muscle contractions can be localized to specific regions of the body to coordinate movement. Signup and view all the answers

The embryonic development in nematodes can have up to __________ larval stages.

four Signup and view all the answers

The nematode cuticle contains _____.

chitin Signup and view all the answers

Crustaceans are _____.

Ecdysozoans Signup and view all the answers

Flies are_______.

hexapods Signup and view all the answers

Which of the following is not a key advantage provided by the exoskeleton of terrestrial arthropods?

Grows with the arthropod throughout its life Signup and view all the answers

Echinoderms have _____.

pentaradial symmetry Signup and view all the answers

The circulatory fluid in echinoderms is _____.

water Signup and view all the answers

Which of the following features does not distinguish humans as a member of phylum Chordata?

Human embryos undergo indeterminate cleavage. Signup and view all the answers

The sister taxon of the Chordata is the _____.

Ambulacraria Signup and view all the answers

Study Notes

Sponges

Choanocytes possess flagella to propel water through the sponge's body.
Pinacocytes do not have the ability to transform into any cell type.
Porocytes regulate water flow through the sponge's pores.
Mesohyl is a gelatinous substance containing collagen and various cells for sponge functions.
The osculum is the large central opening in a sponge's body.
Sponge body plans are variations of a tube-within-a-tube design, limited by reliance on osmosis and diffusion, necessitating a high surface area to volume ratio.

Cnidarians

Cnidocytes are specialized cells found in the Phylum Cnidaria.
Cubozoans exhibit polymorphism within their life cycle.
The Class Scyphozoa includes sessile Cnidarians that produce medusas, which swim by contracting muscle rings in their bells.

Flatworms

Monogeneans, a group of flatworms, primarily act as ectoparasites of fish.

Nematodes

Nematodes can undergo up to four larval stages during embryonic development.
Their cuticle is composed of chitin, providing structural support.

Annelids

Annelids feature a true coelom, enhancing bodily compartmentalization and function.
Segmentation allows for localized muscle contractions, facilitating coordinated locomotion.

Mollusks

Mollusks possess a mantle and a mantle cavity which play essential roles in their physiology.

Arthropods

Crustaceans belong to the Ecdysozoans clade and undergo molting.
Flies are classified as hexapods with six limbs.
Terrestrial arthropods' exoskeletons provide many advantages, but they do not grow consistently with the organism throughout its life.

Echinoderms

Echinoderms are characterized by pentaradial symmetry.
Their circulatory system relies on water as the circulatory fluid.

Chordates

Humans are classified within the phylum Chordata; however, the feature of indeterminate cleavage in embryos does not distinguish them as part of this group.
The sister taxon to Chordata is the Ambulacraria.

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Description

Test your knowledge on invertebrates covered in Biology Chapter 28. This quiz includes questions about the anatomy and characteristics of various invertebrate phyla, such as sponges and mollusks. Challenge yourself with true or false statements about their structure and function.