Exam 21: Animals

Figuer: -Tiktaalik either crawled or paddled in shallow tropical streams about 380 MYA,during the late Devonian period.These shallow waters often became anaerobic.What selective advantage would Tiktaalik have under these conditions?

Sponges belong to the phylum containing the

The three major body regions of many arthropods are

An animal that maintains its body temperature by using heat generated from its own metabolism is a(n)

Figuer: Main animal groups are noted at the right. Names diverging at each node are morphological or body form names. Note that the animal traits key to distinguishing the groups and body forms are not shown. -If an animal is an invertebrate,this means that the animal

Bats,birds,and dragonflies can all fly.Which of the following groups of animals have some members capable of flight?

Which of the following is not a characteristic found among the animals?

Figuer: Main animal groups are noted at the right. Names diverging at each node are morphological or body form names. Note that the animal traits key to distinguishing the groups and body forms are not shown. -Which of the following characteristics do all animals share?

Even semi-aquatic reptiles like crocodiles and alligators can spend much of their life on dry land.Which of the following is an example of an adaptation that would allow reptiles to live and reproduce on dry land?

Caenorhabditis elegans is a nematode that scientists have shown grows from a single cell into about 1000 cells,of which the same 80 cells die during development through apoptosis.Studying this process in Caenorhabditis elegans has helped scientists identify the genes that regulate similar processes in humans.Which of the following statements is supported by this observation?

Pinworms and hookworms belong to the phylum containing the

What is the importance of development genes among sponges and eumetazoans?

Which of the following is not a characteristic of the echinoderms?

An animal with an indirect development undergoes a metamorphosis in which larvae do not resemble the adult.

The embryonic germ layer of tissue in animals that develops into the digestive tract,and organs derived from the digestive tract,is the

A fluid-filled body cavity that forms completely within the mesoderm of animals is a

Mammals that lay eggs are marsupials.

The free-swimming tunicate larva resembles a tadpole. Once it settles headfirst onto a solid surface the tail and notochord disappear, and the nerve cord shrinks to nearly nothing. The adults, which are usually sessile, retain only the pharyngeal slits. Neither adult nor larva is segmented. -A tunicate is in which group?

In most species, the female frog lays her eggs directly in the water as a male clasps her back and releases sperm. The fertilized eggs hatch into legless, aquatic tadpoles. Most tadpoles feed on algae, and have gills. As they mature, tadpoles develop legs and lungs, lose the tail, and acquire carnivorous tastes. -Frogs are in which group?

Which of the following is not a characteristic of a nematode?