Why are vestigial structures not removed by natural selection?
WA
A. Only unimportant structures can be removed.
O
O
O
O
B. They are helpful to the organism.
C. Vestigial structures are genetic traits.
D. They do not harm the organism.

Which of the following graphs have the same wavelengths

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.

People with one sickle cell allele are not likely to get malaria. what is this an example of?