Answer:
Two-element compounds are usually ionic when one element is a metal and the other is a non-metal.
Explanation:
sodium chloride: NaCl, with Na+ and Cl- ions
lithium nitride: Li3N, with Li+ and N3- ions
magnesium oxide: MgO, with Mg2+ and O2- ions
calcium phosphide: Ca3P2, with Ca2+ and P3- ions
Answer:
B. The ancestor of these organisms lived on a landmass long ago that included Madagascar, India, and Australia.
Explanation:
Answer:
The answer is B) arachnoid granulations
Explanation:
Arachnoid Mater and CSF Circulation:
- The arachnoid is the middle layer of the meninges which are the membranes covering the brain.
- The arachnoid is characterized by the spider web like projections that extend between it and the pia mater (outer membrane of the meninges).
- These projections are located in the subarachnoid space (space below the arachnoid). These projections contain the circulating cerebrospinal fluid or CSF.
- The arachnoid extends into the dural sinuses through the arachnoid granulations in which the CSF is filtered and added to the blood for drainage from the brain.
