Graptolites 0.0 / 5 ? GeologygraptolitesA2/A-levelOCR Created by: Oliver ShortCreated on: 07-05-14 21:51 What is the thin extension of sicula used to attach to a floating devise called? Nema 1 of 18 The cup in which one zooid lives is known as? Theca 2 of 18 What is the opening in the skeleton which the zooid protrudes through in order to filter feed called? Aperture 3 of 18 Each individual branch of the rhabdosome is know as? Stipe 4 of 18 The spine at the end of the sicula is called? The virgella 5 of 18 Which phylum do graptolites belong to? Hemichordata 6 of 18 What class are graptolites found in? Graptolithinia 7 of 18 What is the Rhabdosome of a graptoloid? Its skeleton 8 of 18 What was the mode of life graptolites? Planktonic 9 of 18 How did graptolites feed? Filter feed 10 of 18 Between which periods did graptolites live? Ordovician to Devonian 11 of 18 Why are graptolites used as zone fossils? Their rapid evolution, abundance and platonic mode of life 12 of 18 Why is their protein-based composition important with respect to preservation? They wouldn't be dissolved below the CCD and therefore accumulate in low-energy deep seas, where anoxic conditions prevent predation and decay 13 of 18 What does biserial mean? The thecae of graptolites are added on two sides of the stipe 14 of 18 Which evolved first uniserial or biserial graptolites? Uniserial 15 of 18 A single stiped graptolite is called Monograptus 16 of 18 Scandant means? The theca are growing vertically upwards from the sicula 17 of 18 Scandant means? The theca are growing vertically upwards from the sicula 18 of 18
Comments
No comments have yet been made