Questions

Chemical weathering is what happens when rocks are broken down and chemically altered.

Chemical weathering is the breakdown of rocks by chemical reactions. Chemical weathering involves changes in the chemical composition of the existing rock to form new rock. Some examples of chemical weathering are hydrolysis, oxidation, carbonation, dissolution, etc.

3 Nucleotides make up a Codon. 

The nucleotide triplet that encodes an amino acid is called a codon.

Each group of three nucleotides encodes one amino acid.

Local :

Only available to the current Db connection for current user and are cleared when connection is closed.

Multiple users can’t share a local temporary table.

Global:

Available to any connection once created. They are cleared when the last connection is closed.

Can be shared by multiple user sessions

True, Stress is a factor that contributes to heart disease risk.

More factors that contributes to heart disease risk are blood pressure, cholesterol, smoking, physical inactivity and overeating.