posted by .

All organisms in group 2(birds, fish, mammals, echinoderms, amphibians) except _______ are thought to share a common ancestor that possessed many of the same characterisitcs as the modern lancelets.


Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Biology

    20. Three common characteristics of adult vertebrates are a. skull, notochord, and complex organ system b. backbone, segmentation, and open circulatory system c. two pairs of jointed appendages, cephalization, and internal skeleton …
  2. Biology

    Excluding the echinoderms, all the animals in group 2 (birds, mammals, fish, amphibians) have which of the following characteristics in common?
  3. Biology

    what are the radiometric dates of: Homo sapiens, stone tools, sabre toothed cat, wolly mammoth, apes, whales, horses, dinosaursflowering plants, birds, earthworms, reptiles, spiders, sharks, amphibians, land plants, jawless fish, jellyfish …
  4. biology

    mammals are most closely related t : A, amphibians B. birds C. arthropods tks.
  5. Earth Science

    Which organism evolved before the others in geologic time?
  6. 4th grade math

    Endangered species Group number clams 62 birds 14 more than clams mammals 9 fewer than birds fish 70 insects half as many as fish reptiles 21 fewer than insects snails 10 more than reptiles Write an inequality to compare the number …
  7. math

    At a zoo, 1/3 of the animals are birds, 4/9 are mammals, and the rest are reptiles and amphibians. What fraction of animals at the zoo are reptiles and amphibians?
  8. Science

    How are fish,amphibians,reptiles,and birds not alike
  9. Biology

    is this the correct order for what appears first: Dinosaurs, Reptiles, Amphibians, Birds, Fish
  10. Biology

    Is this the correct order for what appears on earth first?

More Similar Questions