Reference no: EM133491565

1. Which of the following surfaces is not found in bilaterally symmetrical animals?

Dorsal
Aboral
Ventral
Posterior
Anterior

2. Nematocysts are _______________ found in_______________.

feeding structures; sponges
stinging cells; cnidarians
gametes; echinoderms
cells for sight; mollusks
reproductive structures; all invertebrates

3. A larva is best defined as which of the following?

Early colony of cells of fresh-water sponges
Early stage of development of an organism, typically part of the plankton
Sperm cell that lives free in the water
Egg that has been fertilized by more than one sperm
Immature stage that is able to reproduce

4. Which of the following is a distinctive feature of arthropods?

Jointed legs
Lack of a digestive system
Proboscis used to capture prey
Lack of a brain
Gills in a mantle cavity

5. Which of the following is not an echinoderm?

Sea Anemone
Sea cucumber
Sea urchin
Sand dollar
Sea star

6. Statocysts are structures used in_________.

swimming movements.
reproduction.
sensing balance.
digesting food.
capturing prey.

7. If a fisherman wishing to get rid of sea stars chops arms off each that he finds, eventually________.

no sea stars will be found in the area.
the bottom of the ocean will be littered with sea star arms.
all sea stars in the area will have no arms.
there will be more sea stars in the area.
sea stars will eat all of the fish that the fisherman doesn't catch.