Describe the adaptations of aves that allow most to fly.

Explain why frogs are restricted to a moist environment.

Which of the following characteristics does not contribute to powered flight in birds? a. a lightweight skeleton b. efficient respiratory and circulatory systems c. enlarged forelimbs and a keeled sternum d. a high metabolic rate that releases energy from food rapidly e. scaly skin on the legs and feet

The circulatory fluid in echinoderms is blood mesohyl water saline

In what ways are the behaviors of Philanthus, the sand wasp, adaptive?

How do the structures of a birds bill, wings, and feet reflect itsdietary and habitat specializations?

Sessile adult tunicates lose the notochord; what does this suggest about one function of this structure?

Cnidocytes are found in _____. a. phylum Porifera b. phylum Nemertea c. phylum Nematoda d. phylum Cnidana

Describe the differences between the larval and adult stages of frogs.

Why would you think twice about ordering from a restaurant menu that lists the specific epithet but not the genus name of its offerings? Hint: Look up Homarus americanus, Ursus americanus, Ceanothus americanus, Bufo americanus, Lepus americanus, and Nicrophorus americanus.