Biology 204 - Homework
1. Which of the following about bilaterians is true?: All bilaterians are triploblastic (have three
germ layers)
2. What's the basal taxon of metazoans (animals): Porifera
3. The animal phylum most like the protists that gave rise to the animal kingdom
is: Porifera
4. Which of the following structures can be found in the mesohyl of a sponge?-
: amoebocytes and spicules
5. Which of the following is a characteristic of cnidarians?: gastrovascular cavity
6. Which of the following statements is correct?: All animals share a common ancestor.
7. Which of the following statements describes how healthy corals appear
brightly colored?: they host symbionts with colorful photosynthetic pigments
1/3
, 8. If you brush your fingers along the tentacles of a sea anemone, which of
the following are you most likely to find upon microscopic examination of your
fingers?: nematocysts
9. cheliceriforms: possess claylike feeding appendages, arachnids, horshoe crab
10. myriapods: millipede and centipededs, exclusively terrestrial
11. insects: body divided into head, thorax, and abdomen, three pairs of walking legs, wings allow flight, butterfly
12. crustacenas: primarily aquatic, two pairs of antennae, crabs and isopods
13. Which of the following statements correctly describes one difference be-
tween nematodes and arthropods?: arthropods have an open circulatory system while nematodes
do not have a circulatory system
14. Which of the following are thought to be most closely related to humans?: sea
stars (both duertesomes)
2/3
1. Which of the following about bilaterians is true?: All bilaterians are triploblastic (have three
germ layers)
2. What's the basal taxon of metazoans (animals): Porifera
3. The animal phylum most like the protists that gave rise to the animal kingdom
is: Porifera
4. Which of the following structures can be found in the mesohyl of a sponge?-
: amoebocytes and spicules
5. Which of the following is a characteristic of cnidarians?: gastrovascular cavity
6. Which of the following statements is correct?: All animals share a common ancestor.
7. Which of the following statements describes how healthy corals appear
brightly colored?: they host symbionts with colorful photosynthetic pigments
1/3
, 8. If you brush your fingers along the tentacles of a sea anemone, which of
the following are you most likely to find upon microscopic examination of your
fingers?: nematocysts
9. cheliceriforms: possess claylike feeding appendages, arachnids, horshoe crab
10. myriapods: millipede and centipededs, exclusively terrestrial
11. insects: body divided into head, thorax, and abdomen, three pairs of walking legs, wings allow flight, butterfly
12. crustacenas: primarily aquatic, two pairs of antennae, crabs and isopods
13. Which of the following statements correctly describes one difference be-
tween nematodes and arthropods?: arthropods have an open circulatory system while nematodes
do not have a circulatory system
14. Which of the following are thought to be most closely related to humans?: sea
stars (both duertesomes)
2/3
