(Question)
Q: What organism is characterized by an incomplete digestive system and a single, tentacled opening? Read this paragraph and choose the correct option from the provided answers: Cnidarians have an incomplete digestive system with a single opening. The opening is surrounded by tentacles, which are covered with nematocyst cells and used to capture prey. Digestion takes place in the digestive cavity. Nutrients are absorbed and gases are exchanged through the cells lining this cavity. Fluid in the cavity supports and stiffens the cnidarian body. Choices: - annelids - prokaryotes - sponges - cnidarians A:
(Answer)
cnidarians

(Question)
Q: People with red hair usually have what type of skin? Read this paragraph and choose the correct option from the provided answers: 7. People with red hair usually have very light skin. What might be a genetic explanation for this observation?. Choices: - dark - oily - dry - light A:
(Answer)
light

(Question)
Q: Animals that molt their exoskeletons belong to which clade? Read this paragraph and choose the correct option from the provided answers: Figure 27.13 Animals that molt their exoskeletons, such as these (a) Madagascar hissing cockroaches, are in the clade Ecdysozoa. (b) Phoronids are in the clade Lophotrochozoa. The tentacles are part of a feeding structure called a lophophore. (credit a: modification of work by Whitney Cranshaw, Colorado State University, Bugwood. org; credit b: modification of work by NOAA). Choices: - protists - spirogyra - trichina - ecdysozoa A:
(Answer)
ecdysozoa