What can be utilized for energy if sugars are not available?

Describe five factors that influence the value of fuel

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.