JBHA 7Use lined Paper to write number and answers only (print out at home)

Go to this link ARTHROPODS site on to begin webquest.

1)More than _____ percent of all described animal species are arthropods.

2)Tiny crustaceans called ______could outweigh all the whales on Earth.

3)The ______ants of the Australian desert can withstand temperatures higher than ______degrees Celsius.

4)Australian ______construct elaborate snares for unsuspecting insects.

5)List the five branches of the arthropod tree:

1. ______

2. ______

3. ______

4. ______

5. ______

6)Arthropods usually have these five characteristics:

  1. ______symmetry
  2. ______body
  3. Hard ______
  4. ______legs
  5. Many pairs of ______

7)Which animal did not have bilateral symmetry? ______

8)The bodies of arthropods are supported by a hardened exoskeleton made of ______

9)What does the prefix arthro- mean? ______What does –pod mean? ______

10)How many limbs does the jellyfish have? ______

11)On the checklist, which animals were arthropods? ______

______

12) Describe how Cambrian life was different from life today: ______

______

13)Is Sanctacaris an arthropod? _____ Why or why not? ______

14)Is Opabinia an arthropod? ______Why or why not? ______

15)Is Pikaia an arthropod? _____ Why or why not? ______

16)Under which branch is Pikaia placed? ______

17)Under which branch is Hallucigenia placed? ______

18)Trilobites survived for more than ____ million years and dominated the ______

19)Many trilobite species evolved _____, thought to have been used for ______

20)Some legs can be used for ______, while others can evolve to ______, ______or swim.

21)Give one example of limb specialization: ______

______

22)Why wouldn’t a large animal want to have an exoskeleton? ______

23)What happens when you click on the large crab? ______

24)What happened when the large ant tried to forage for food? ______

25)A single section of arthropod leg is a lot like a _____ holding up a ______.

26)______increases faster than the dimension of a single side of a cube does.

27)What happened to the tube with the 64 kg box? ______

28)Why can’t evolution scale up ants by making their legs extra-wide? ______

29)How do insects get oxygen? ______

30)What processes have shaped the evolutionary history of arthropods? ______

______