Biology Quiz

Which phylum has a water vascular system?

• molluscs

• echinoderms

• cnidarians

• annelids

• arthropods

Which would be a great surprise if found in the body of a sponge?

• spongocoel

• osculum

• mesohyl

• limb

The dominant invertebrate predator of the seas for hundreds of millions of years until the mass extinction at the end of the Cretaceous period was the

• lamprey

• annelid

• ammonite

• anemone

• squid

Tags

NGSS.MS-LS4-1

The least-important threat faced by freshwater and terrestrial molluscs is ______.

• habitat loss

• pollution

• competition or predation by non-native species

• overharvesting

• changes in how water is released from dams

Tags

NGSS.MS-ESS3-4

The major difference between the two divisions of annelids, the errantians and sedentarians, is that _____.

• sedentarians are less mobile than errantians

• errantians include leeches

• sedentarians are all marine organisms

• sedentarians contain parapodia

• sedentarians are more mobile than errantians

Which statement about nematodes is incorrect?

• Nematodes are found in most aquatic habitats.

• They have no circulatory system.

• They include many species that parasitize plants and animals.

• They play roles in decomposition and nutrient cycling.

• Trichinella spiralis has become a model research organism in biology.

Which statement about arthropods would lose points on an exam?

• Arthropods have an open circulatory system.

• Arthropods have well-developed sensory organs.

• Arthropod bodies are completely covered by a cuticle.

• Terrestrial arthropods have internal structures specialized for gas exchange.

• Most arthropod sensory organs are concentrated at the posterior end.

Your friend, who was setting up a lab on arthropods for your class, put out specimens of the following groups. Which needs to be removed?

• chelicerates

• myriapods

• pancrustaceans

• ophiuroids

How many periwinkles were placed in a cage with each crab?

• Four

• Six

• Eight

• Ten

Researchers collected periwinkles and crabs from sites in the northern and southern parts of the Gulf of Maine. A single crab was placed in a cage with eight periwinkles of different sizes. (All crabs were of similar size and included equal numbers of males and females.) Four treatments were set up, and each treatment was tested 12 to 14 times:

  Northern crab caged with northern periwinkles

  Northern crab caged with southern periwinkles

  Southern crab caged with northern periwinkles

  Southern crab caged with southern periwinkles

After three days, the researchers assessed the fate of the eight periwinkles. The bar graph shows the data from this experiment.

In a second experiment, the researchers removed the bodies of northern and southern periwinkles from their shells and presented the bodies to northern and southern crabs. The crabs consumed all of the unshelled periwinkles in less than an hour.

What did the researchers do in the second experiment?

• They changed the water temperature

• They removed the shells from the periwinkles

• They added more crabs to the cages

• They moved the crabs to a different location