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Most aquatic group of dinosaurs

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Reference no: EM133307896

Questions

1. Which of the following does the study of paleohistology not usually tell us?

the dinosaur's age at sexual maturity

the dinosaur's rate of growth

the age at which the dinosaur died

the sex of the dinosaur

2. Lines of arrested growth in a bone record _______________.

medullary bone (calcium storage deposited in pregnant females' bones)

injuries and illness

times where the animal had too much to eat

seasonal (annual) slowing of bone growth, and so represent each year of an animal's life

3. From looking at both lines of arrested growth and medullary bone, we would be able to tell:

how old a dinosaur was when it was sexually active, and pregnant

that a dinosaur was definitely a male

how long a dinosaur could live

how fast a dinosaur grew

4. A ceratopsian like Einiosaurus could reach sexual maturity in about _______________ years, since this is when the bone growth slows down.

five

fifty

twenty

100

5. With Julie's Einiosaurus material, it is notable that __________ appear to be missing from the sample of this herd.

full-grown adults

juveniles

subadults

females

6. Which of the following is the most aquatic group of dinosaurs?

ichthyosaurs

plesiosaurs

brachiosaurs

penguins

Reference no: EM133307896

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