Blue-footed boobies have webbed feet and are comically clumsy when they walk on land. Evolutionary scientists view these feet as
A) an example of a trait that is poorly adapted.
B) the outcome of a trade-off: Webbed feet perform poorly on land but are very helpful in diving for food.
C) an example of a trait that has not evolved.
D) a curiosity that has little to teach us regarding evolution.
Answer: B
You might also like to view...
An organism that causes infection as a result of a dog or cat bite was tested for catalase, resulting in a positive reaction. What could be the possible source of the error?
a. The catalase reagent could be expired. b. This organism is normally negative for catalase; therefore a mutation may have occurred. c. A false-positive result occurred because of the catalase production of the red blood cells in the 5% sheep blood agar. d. No error is present. This organism is cata-lase-positive.
The stage of mitosis when sister chromatids separate from each other and migrate to opposite poles of a cell is called
A) interphase. B) prophase. C) metaphase. D) anaphase. E) telophase.
A group of individuals of the same species inhabiting a given area is called a(n) ________
Fill in the blank(s) with correct word
A pheromone is a chemical signal secreted into the environment
____________________ Indicate whether the statement is true or false.