Members of the phylum Echinodermata move using a(n) ____________ ____________ system and include the sea
stars, brittle stars, sea urchins, and sea cucumbers. Fill in the blank(s) with the appropriate word(s).
water vascular
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What is often found in the middle of manganese nodules?
A) Microtektites B) Shark teeth or bone fragments C) Living bacteria D) None of these choices
Which type of dam is built to control downstream flooding?
a. flood-control dam b. wing dam c. hydroelectric dam d. spillway dam e. all types of dams
Clays are sometimes instrumental in mass movements because of their ability to ________
A) become smaller over time B) move uphill C) become translucent D) absorb water E) capture sunlight
Divergent plate boundaries around the world are indicated by
A. both seafloor spreading and subduction zones. B. seafloor spreading. C. hotspots. D. subduction zones.