Which of the following is not an example of a vestigial structure?
A. appendix in humans
B. human gall bladder
C. pelvis in a whale
D. All of these are vestigial.
Answer: B
You might also like to view...
Who developed the method widely used to sequence DNA?
What will be an ideal response?
At which point or stage would the majority of cells in the embryo no longer be stem cells?
A) the pre-embryo stage B) after the organs start to develop C) in the blastocyst D) A large number of stem cells would exist in all these stages.
Protein structures have several different levels of organization. The primary structure of a protein is its amino acid sequence. The secondary and tertiary structures are more complicated
Consider the definitions below and select the one that best fits the term "protein domain." (a) a small cluster of ? helices and ? sheets (b) the tertiary structure of a substrate-binding pocket (c) a complex of more than one polypeptide chain (d) a protein segment that folds independently
Lichens are symbiotic associations that __________.
a. are found in the tissues of plants and may protect them from pathogens or herbivores b. involve a fungus and a green algae or cyanobacterium c. require moist environments to grow d. fix nitrogen for absorption by plant roots e. enabled plants to move onto land