Angiosperms are flowering plants, so I'd say flowers and the parts of flowers are a pretty common characteristic.
Answer:
Hello it could mean unfrienliness
similar could be hatred
Explanation:
The pyramid of energy <span />
Answer: A physical change
Explanation: since the melted they are still Crayons. You can freeze it and it would still be a crayon. So it was only a physical change
Answer:
5 bases
Explanation:
If there are 17 amino acids and only 2 bases that can be combined in order to make a codon then:
for 4 bases 
is 16 and it is not enough combination for all 17 amino acids
for 5 bases 
is 25 combinations (meaning that more than one codon could code for the same amino acid).
