Explanation:
The "fossil record" refers to the placement of fossils throughout the surface layers of the Earth. Older fossils are buried more deeply than younger ones. Scientists use the placement of fossils as a guide for determining when life forms existed, and how they evolved.
Answer:
A teenager's decision to drink alcohol can be influenced by: early introduction to alcohol. exposure to adult binge drinking or alcohol dependence. access to alcohol from parents and others.
Answer:
833
Explanation:
A codon (3 nucleotides) codes for 1 Amino Acid, 2499 divided by 3 = 833.
Answer: C, Appears to be genetically almost inactive.
Sources: https://answers.yahoo.com/question/index?qid=20110412082808AAEciMo
and
https://answers.yahoo.com/question/index?qid=20111027121958AA1U5VE
hope I get brainiest answer