Which observations illustrate shared ancestry by anatomical comparison studies? Check all that apply.
A. Structures are found to be homologous.
B. A structure becomes vestigial.
C. Different structures evolve in similar ways when subjected to the same selective pressures.
D. The same structure has evolved to carry out different functions.
Answer: D
You might also like to view...
The restriction enzyme SmaI cuts DNA at the 6-base recognition sequence 5'-CCCGGG-3'. Calculate the frequency of occurrence of this sequence. (Assume a 50% GC content.)
What will be an ideal response?
Biologists will eventually shift from a super tree to a tree based on analyses of whole genomes
a. true b. false
The pH of human blood is approximately 7.4 and the body temperature is approximately 37 °C. Which of the following best describes a human pathogen?
A) neutrophiles & acidophiles B) acidohphiles & thermophiles C) neutrophiles & mesophiles D) thermophiles & mesophiles
About how many gibberellins have been identified in plants?
A) one B) five C) over one hundred D) thousands