Answer the following question given this paragraph: Class Bivalvia ("two shells") includes clams, oysters, mussels, scallops, and geoducks. Members of this class are found in marine as well as freshwater habitats. As the name suggests, bivalves are enclosed in a pair of shells (valves are commonly called "shells") that are hinged at the dorsal end by shell ligaments as well as shell teeth (Figure 28.22). The overall morphology is laterally flattened, and the head region is poorly developed. Eyespots and statocysts may be absent in some species. Since these animals are suspension feeders, a radula is absent in this class of mollusks. Respiration is facilitated by a pair of ctenidia, whereas excretion and osmoregulation are brought about by a pair of nephridia. Bivalves often possess a large mantle cavity. In some species, the posterior edges of the mantle may fuse to form two siphons that serve to take in and exude water. Q: Class bivalvia ("two shells") includes clams, oysters, mussels, scallops, and these? A:

OPTIONS:
- grendels
- crabs
- octopuss
- geoducks

Answer: geoducks

Answer the following question given this paragraph: 34.3 Vertebrates are craniates that have a backbone. Q: What type of craniates have backbones? A:

OPTIONS:
- juveniles
- invertebrates
- larva
- vertebrates

Answer: vertebrates

Answer the following question given this paragraph: The autonomic nervous system serves as the relay between the CNS and the internal organs. It controls the lungs, the heart, smooth muscle, and exocrine and endocrine glands. The autonomic nervous system controls these organs largely without conscious control; it can continuously monitor the conditions of these different systems and implement changes as needed. Signaling to the target tissue usually involves two synapses: a preganglionic neuron (originating in the CNS) synapses to a neuron in a ganglion that, in turn, synapses on the target organ (Figure 16.24). There are two divisions of the autonomic nervous system that often have opposing effects: the sympathetic nervous system and the parasympathetic nervous system. The sympathetic nervous system is responsible for the immediate responses an animal makes when it encounters a dangerous situation. One way to remember this is to think of the "fight-or-flight" response a person feels when encountering a snake ("snake" and "sympathetic" both begin with "s"). Examples of functions controlled by the sympathetic nervous system include an accelerated heart rate and inhibited digestion. These functions help prepare an organism's body for the physical strain required to escape a potentially dangerous situation or to fend off a predator. Q: The autonomic nervous system serves as the relay between what and the internal organs? A:

OPTIONS:
- hormones
- somatic system
- peripheral nervous system
- central nervous system

Answer: central nervous system

Answer the following question given this paragraph: Air conditioning systems that can incubate certain bacteria and mold. Q: Air conditioning systems can incubate certain bacteria and what else? A:

OPTIONS:
- Cancer
- wood
- root
- mold

Answer:
mold