Water gains energy during evaporation and releases it during condensation.
Composite volcanoes. Had this question on apex:)
Phospholipids are the lipids are the main constituents of the cellular membrane. The phospholipids; sphingolipids, and phosphatidylcholine are the two foremost lipids of the membranes. Phospholipids help in maintaining the integrity and fluidity of the membranes.
A useful index fossil must be distinctive or easily recognizable, abundant, and have a wide geographic distribution and a short range through time.