Nematodes and arthropods are the largest ecdysozoan phyla. Which of the following statements are true? The cuticle in nematodes lengthens as the animal grows. |
Both nematodes and arthropods must molt in order to increase in size. Arthropods possess an open circulatory system. Some nematodes are parasitic on humans. Both nematodes and arthropods possess an external covering, or cuticle. Arthropods are named for their jointed appendages |
You are an entomologist for the federal agency in charge of deciding the fate of neonicotinoids in the United States. Food and Drug Administration |
Environmental Protection Agency |
How are varroa mites harmful to bees? They eat the bees' food supply. |
They spread pathogens. |
Which of the following individuals would most likely be against a ban on neonicotinoids in the United States? a member of the Pesticide Action Network |
a cotton farmer |
What does Syngenta likely think is currently the best option when it comes to preventing more honeybee deaths? Banning neonicotinoids. |
Killing varroa mites. |
You are a scientist working for BASF and you are studying the effects of neonicotinoids on honeybees. Which body system should you focus on? immune |
immune |
Which of the following would most likely cause Turritopsis dohrnii to go through cellular transdifferentiation? being exposed to salt water |
being repeatedly poked and prodded |
Which of the following is the sexual stage of a hydrozoan? spore |
medusa |
You are a scientist specializing in hydrozoans. You observe a species with many stolons. What will these stolons become? eggs |
polyps |
You are a cancer researcher and you discover an on-off switch for the BRAF oncogene. What have you found? DNA |
MiRNA |
If Shin Kubota's hunch is correct, the key to Turritopsis dohrnii immortality lies where? its bell |
its tentacles |
Sponges are most accurately described as aquatic predators. |
filter feeders. |
Some species of rotifers consist solely of females. Their method of reproduction is described as _____. binary fission |
parthenogenesis |
Which of the following animal groups is entirely aquatic? Platyhelminthes |
Echinodermata |
Which clade in the phylum Cnidaria includes "jellies" with rounded (as opposed to boxlike) medusae? Anthozoa |
Scyphozoa |
Members of the phylum Mollusca _____. have segmented bodies and paired, jointed appendages |
are soft-bodied and often covered by a shell |
A shared derived characteristic for members of the arthropod subgroup that includes spiders would be the presence of an open circulatory system. |
chelicerae. |
Which of the following is true of annelids? They have an open circulatory system. |
They perform gas exchange across their skin. |
Which of the following is characteristic of the phylum Platyhelminthes? They typically reproduce asexually. |
They are dorsoventrally flattened. |
How many of the following are characteristics of at least some members of the phylum Cnidaria? 1 |
1, 2, 3, and 4 |
The organ(s) of respiratory gas exchange in oligochaetes is (are) book lungs. |
the skin. |
The excretory organs of annelids are skin gills. |
metanephridia. |
The water vascular system of echinoderms functions in locomotion and feeding. |
functions in locomotion and feeding. |
A radula is present in members of which clade(s)? bivalves and chitons |
chitons, gastropods and cephalopods |
In a tide pool, a student encounters an organism with a hard outer covering that contains much calcium carbonate, an open circulatory system, and gills. The organism could potentially be a crab, a shrimp, a barnacle, or a bivalve. The presence of which of the following structures would allow for the most certain identification of the organism? eyes |
a mantle |
Which phylum is characterized by animals that have a segmented body? Cnidaria |
Arthropoda |
A land snail, a clam, and an octopus all share gills. |
a mantle. |
Which of the following is a characteristic of cnidarians? bilateral symmetry |
gastrovascular cavity |
The animal phylum most like the protists that gave rise to the animal kingdom is _____. Echinodermata |
Porifera |
What evidence suggests that vertebrates are more closely related to echinoderms than are any other invertebrate phyla? Shared DNA sequences |
Shared DNA sequences |
Which of the following is a characteristic of nematodes? They have a gastrovascular cavity. |
They have only longitudinal muscles. |
Some invertebrates combine morphological simplicity with features of great structural or biochemical complexity. Select all correct examples of this statement. Sponges lack true tissues but have more variation in cell type than animals in any other phylum. |
Trematodes are acoelomates that have effective defenses against attack by their hosts' immune system. Cnidarians are diploblasts that produce complex, capsule-like organelles. |
Select the correct statement(s) about invertebrate taxa. Tapeworms lack a mouth and gastrovascular cavity. |
Tapeworms lack a mouth and gastrovascular cavity. Ectoprocts lack a distinct head. Rotifers are smaller than many protists. |
Which of the following are thought to be most closely related to humans? ants |
sea stars |
A terrestrial animal species is discovered with the following larval characteristics: exoskeleton, system of tubes for gas exchange, and modified segmentation. A knowledgeable zoologist should predict that the adults of this species would also feature two pairs of antennae. |
an open circulatory system. |
In terms of food capture, which sponge cell is most similar to the cnidocyte of a cnidarian? epidermal cell |
choanocyte |