The correct answer is If spiders evolved first, six legs is the derived trait.
The teacher says that the insects have six legs and the spiders have 8 legs, but the spiders derived this trait and evolved prior than the insects.
The student thinks that the teacher is wrong because he thinks, of the spiders evolved first, the the insects must have derived the 6 leg trait later in the evolutionary history. hence, the 6 leg trait should be derived trait, not the 8 leg trait.
The group that distinguishes alcohols from other classes of compounds is the hydroxyl group (OH).
Alcohols or alkanols are a group of hydrocarbon with a functional group; hydroxyl (OH) group that is attached to at least one carbon atom in a given compound. Alkanols consist of an alkane (compounds that contains carbon and hydrogen atoms single bonded to each other) that contains a hydroxyl group.
Answer:
b. option Is the correct answer right