Test 2 – Flashcards

Both animals and fungi are heterotrophic. What distinguishes animal heterotrophy from fungal heterotrophy from fungal heterotrophy is that most animals drive their nutrition by______ A. preying on animals B. ingesting it C. consuming living, rather than dead, prey D. using enzymes to digest their food

What do animals ranging from corals to monkeys have in common? A. a mouth and an anus B. number of embryonic tissue layers C. type of body symmetry D. presence of Hox genes

Which tissue type, or organ, is NOT correctly matched with its germ layer tissue? A. nervous-- mesoderm B. muscular-- mesoderm C. stomach-- endoderm D. skin-- ectoderm

What do all deuterostomes have in common? A. Adults are bilaterally symmetrical. B. Embryos have pharyngeal pouches that may or may not form gill slits. C. All have a spinal column. D. The pore (blastopore) formed during gastrulation becomes the anus

A student encounters an animal embryo at the eight-cell stage. The four smaller cells that comprise one hemisphere of the embryo seem to be rotated 45 degrees and to lie in the grooves between larger, underlying cells. This Embryo may potentially develop into a(n) A. turtle B.earthworm C. sea star D. sea urchin

A student encounters an animal embryo at the eight-cell stage. The four smaller cells that comprise one hemisphere of the embryo seem to be rotated 45 degrees and to lie in the grooves between larger, underlying cells. If we were to separate these eight cells and attempt to culture them individually, then what is most likely to happen? A. all eight cells will die immediately. B. Each cell may continue development, but only into a nonviable embryo that lacks many parts. C. Each cell may develop into a full-sized, normal embryo. D. Each cell may develop into a smaller-than-average, but otherwise normal, embryo.

Bilaterally symmetrical animals A. tend to be active and move forward. B. tend to exhibit cephalization. C. have right and left sides when cut longitudinally. D. All of the choices are correct

Which of the following is NOT a characteristic of all animals? A. Animals are heterotrophic by ingestion or absorption. B. Animals produce gametes by meiosis. C. Animals digest their food internally. D.Animals are multicellular eukaryotes.

Which statement concerning body symmetry is not correct? A. In radial symmetry, two identical halves are obtained regardless of how the animal is sliced longitudinally. B. The evolution of bilateral symmetry is accompanied by cephalization. C. Asymmetrical animals have no body shape. D. Bilaterally symmetric animals are usually sessile. E. Radial symmetry is useful because the animals can reach out in all directions.

In ___, the mouth develops at or near the blastopore. A. gastrocoelomates B. blastocoelomates C. protostomes D. deuterostomes E. triploblastics

You find what you believe is a new species of animal. Which of the following characteristics would enable you to argue that it is more closely related to a flatworm than it is to a roundworm? A. It is a suspension feeder. B. It has no coelom. C. It is shaped like a worm. D. It has a mouth and an anus.

Which of the following is NOT a characteristic of the sponges? A. If the cells of a sponge are mechanically separated, they will spontaneously reassemble into a complete and functioning sponge. B. Sponges have two tissue layers. C. Sponges have an osculum, an opening in the upper body. D. Sponges are filter feeders. E.Sponges can reproduce sexually or asexually.

A recent study of the marine hawksbill turtles' stomach contents revealed that sponges constitute a major portion of their diet. Sponge beds are generally protected from predators by their calcium and silica crystals, but these were found in the turtles' digestive systems. These protective structures are called A. amoebocytes. B. osculum C. choanocytes. D. spicules E. spongin

Which of the following are NOT cnidaria? A. corals B. planaria C. sea anemones D. hydrozoa E. portuguese man-of-war

A natural predator of the crown-of-thorns sea star is a mollusc called the Giant Triton, Charonia tritonis. If the triton uses a radula to saw into the sea star, then to which clade should the triton belong? A. chitons B. bivalves C. gastropods D. cephalopods

Which of the following statements is NOT correct about cnidaria? A. The adult body is bilaterally symmetrical. B. Most are found in shallow coastal marine environments. C. There are two tissue layers, an outer epidermis and inner gastrodermis. D. Stinging cells contain a threadlike nematocyst released to capture prey. E. A jellylike mesoglea separates the two tissue layers..

Which statement most accurately describes the colonial flagellate hypothesis? A. Animals are descended from an ancestor that resembles a spherical colony of flagellated cells B. Bot animals and fungi are descended from an ancestor that resembles a spherical colony of flagellated cells. C. All animals are descended from an ancestor that resembles a single celled organism that was a flagellated cell. D. None of these describe the colonial flagellate hypothesis.

The lophotrochozoans can be divided into two groups, which include A. the protostomes and the deuterostomes. B. the comb jellies and the cnidarians. C. those that reproduce sexually and those that reproduce asexually. D. the lophophorates and the trochozoans.

What is the function of the buds formed by hydras? A. they aid in digestion B. They develop into cnidocytes and can be used in defense. C. They develop into the nerve net and are used to detect prety. D. They produce new epidermal tissue to replace the old tissue. E. They are a form of asexual reproduction