Some Whales Have Teeth as Embryos but Do Not as Adults

question 73

Multiple Choice

Some whales have teeth as embryos but do not as adults. What is the most likely explanation of this phenomenon?

• A)Whales are in the process of evolving teeth.
• B)Whale teeth appear as the result of a frequently occurring mutation.
• C)Whales evolved from organisms that have teeth.
• D)The allele for teeth is unusually common in some whale populations.