Exam 33: An Introduction to Invertebrates

Use the following information to answer the questions below. A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from university. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly "jet" through the water. Watching further, she is able to conclude that the "mystery organisms" are ambush predators, and their prey includes everything from insects to small fish and tadpoles. -Sarah noticed the presence of many empty exoskeletons attached to emergent vegetation. These exoskeletons looked exactly like those of the largest of the "mystery organism" she had seen in the pond. They also looked similar to the bodies of the dragonflies that patrolled the surface of the pond. If Sarah had learned a lot from her biology class, what should she have concluded about the mysterious pond organisms?

Use the following information to answer the questions below. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. -The antennae of insects have a function most similar to that of

Use the following information to answer the questions below. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. -The spiracles and tracheae of insects have a function most similar to that of

In the lab, you are comparing several insect species that undergo metamorphosis. In incomplete metamorphosis, the juveniles look like small adults, while in complete metamorphosis, the different larval stages look completely different from the adults. Both types of insect groups are successful and well-adapted to their environments. -Can you think of a potential advantage of complete metamorphosis?

The organ(s)of respiratory gas exchange in oligochaetes is (are)

Use the following information to answer the questions below. A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from university. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly "jet" through the water. Watching further, she is able to conclude that the "mystery organisms" are ambush predators, and their prey includes everything from insects to small fish and tadpoles. -From this description, one can conclude that the organisms that have caught Sarah's attention are

A radula is present in members of which clade(s)?

Use the following information to answer the questions below. A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from university. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly "jet" through the water. Watching further, she is able to conclude that the "mystery organisms" are ambush predators, and their prey includes everything from insects to small fish and tadpoles. -If the pond organisms are larvae, rather than adults, Sarah should expect them to have all of the following structures except

A land snail, a clam, and an octopus all share

The possession of two pairs of antennae is a characteristic of

Nematode worms and annelid worms share which of the following features?

Use the following information to answer the questions below. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. -Which human profession is most analogous to the lifestyle of the sea slugs described in this scenario?

A sponge's structural materials (spicules, spongin)are manufactured by the

If the teacher had wanted to demonstrate that some invertebrates possess a closed circulatory system, the teacher should have removed and dissected a

Which of the following combinations of phylum and description is incorrect?

Which chemical is synthesized by some sponges and acts as an antibiotic?

Planarians lack dedicated respiratory and circulatory systems because

If the teacher had used a dissecting microscope to examine the outer surfaces of the empty bivalve shells, the teacher would probably have seen marks that had been left by

A student observes a wormlike organism crawling about on dead organic matter. Later, the organism sheds its outer covering. One possibility is that the organism is a larval insect (like a maggot). However, it might be a member of the phylum ________, and one way to distinguish between the two possibilities is by looking for ________.

The great success of insects on land can be attributed to which key adaptation?