The structure indicated by the letter “B” above
represents
a. actin.
b. myofibril.
c. myosin.
d. myofilament.
e. muscle fiber.
Answer: a
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Compare the graphs in the figure above of carbon dioxide (CO2) emission for Cormocephalus morsitans and Scutigerina weberi. What hypothesis can you make about each centipede's habitat?
A) C. morsitans lives in a habitat that provides more carbon dioxide than does S. weberi. B) C. morsitans lives in a habitat with more predators than does S. weberi. C) C. morsitans lives in a colder habitat than does S. weberi. D) C. morsitans lives in a drier habitat than does S. weberi.
Persistent pollutants that accumulate in living tissue will be most concentrated in the bodies of
A. producers. B. decomposers. C. carnivores. D. herbivores.
Which of the following is an example of sex-limited inheritance?
A) cat fur length B) hemophilia C) beard formation in humans D) hair color in humans E) human baldness
Answer the following questions true (T) or false (F)
1. A population of salamanders migrates from a sand beach to a pebble beach and evolves over many generations from a solid color to speckled coloration. This process is called stabilizing selection. 2. If a species of bird with an intermediate beak size evolves into two varieties, one with large beaks and one with small beaks, this could result from disruptive selection. 3. Even through they are separate species, lions and tigers can interbreed.