How are living mammals classified into groups?
a. type of circulatory system
b. method of development
c. method of respiration
d. method of regulating body temperature

4. how does a phospholipid behave in water? the phosphate head does not mix with water; the fatty acid tails do. the phosphate head and the fatty acid tails mix with water. the phosphate head and the fatty acid tails do not mix with water. the phosphate head mixes with water; the fatty acid tails do not.

What is used as a template during replication? a- mrna b- trna c- rrna d- dna

Which kind of mutation has occurred when the codon for an amino acid is changed to a stop codon? a. a silent mutation b. a missense mutation c. a frameshift mutation d. a nonsense mutation