Which of the following phyla have a water vascular system?
answer
echinoderms
question
Which of the following is not a region, cavity, or opening that is found within the body of a sponge?
answer
mesophyll
question
Which of the following statements about molluscs is incorrect?
answer
They are the most diverse phylum.
question
All of the following are threats faced by freshwater and terrestrial molluscs except
answer
changing how water is released from dams
question
The major difference between the two divisions of annelids, the errantians and sedentarians, is that
answer
sedentarians are less mobile than errantians
question
Which of the following statements about nematode (or round) worms is incorrect?
answer
Trichinella spiralishas become a model research organism in biology.
question
Which of the following is not a general characteristic of arthropods?
answer
Most arthropod sensory organs are concentrated at the posterior end
question
Which of the following is not one of the three major lineages of living arthropods?
answer
ophiuroidea
question
Which of the following pairings of phylum and description is incorrect?
answer
Porifera—gastrovascular cavity, coelomate
question
Which of the following is a hypothesis the researchers were testing in this study?
answer
Through evolution, periwinkle populations with a history of predation by crabs have become less vulnerable to crab predation.
question
Which of the following is an independent variable in this experiment?
answer
the source of the periwinkles (northern or southern sites in the Gulf of Maine)
question
Which of the following is the dependent variable in this experiment?
answer
the number of periwinkles killed by crabs
question
How was repeatability demonstrated in this experiment?
answer
For each treatment, 12-14 crabs were offered a selection of periwinkles.
question
Why did the researchers set up four treatments?
answer
to test whether the origin (northern site or southern site) of the crabs and periwinkles affected their interactions
question
Why did the researchers present unshelled northern and southern periwinkles to northern and southern crabs in the second experiment?
answer
to test if either population of periwinkles was unpalatable to either population of crabs
question
Which of the following best summarizes the results shown in the graph?
answer
Crabs are more successful in preying on northern periwinkles.
question
Based on the results shown in the graph, how has natural selection affected populations of flat periwinkles in the southern Gulf of Maine over the last century?
answer
Southern populations of flat periwinkles have accumulated traits that make them less vulnerable than northern populations to predation by European green crabs.
Haven't found what you need?
Search for quizzes and test answers now
Quizzes.studymoose.com uses cookies. By continuing you agree to our cookie policy
