Exam 23: Animal Diversity I: Invertebrates

An animal whose body cavity is completely lined with mesoderm has a pseudocoelom. True or False?

What causes schistosomiasis, a devastating disease that affects about 200 million people in tropical regions?

Which invertebrate animal group is characterized by having a closed circulatory system?

Adult echinoderms that have radial symmetry lack:

During insect metamorphosis, a larva forms a ________ before becoming an adult.

An animal like a grasshopper can conserve water because it has an elaborately branching system of tubes within its body that it uses for gas exchange. These tubes are called:

Animals that have no body cavity between the digestive system and the body wall are ________.

The simplest multicellular animals that have only a few different cell types are:

Spiders belong to the:

Sponges have:

A hemocoel is part of an open circulatory system. True or False?

Parasitic tapeworms are members of the phylum:

A(n)________ provides support and protection to arthropods.

Groups of similar cells that function together form ________.

Hydrae, anemones, and jellyfish are in the phylum:

Which of these groups is characterized by a lack of symmetry (neither radial nor bilateral)?

Flatworms lack:

Giant squids are classified as:

Your job is to classify a newly discovered animal species. Your initial studies reveal that your specimen has tissues, organs, a head, and a pseudocoelom; has no segmentation; and has bilateral symmetry. To what phylum does this animal belong?

Which germ layer gives rise to the muscle layer of the uterus?