Which of the following is a pigment used to alter the color of salmon?
A) Green fluorescent protein
B) Astaxanthin
C) Auxin
D) AFP
E) Hydroxyapatite
B
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Enzymes speed up a chemical reaction by ____
a. lowering the activation energy b. lowering the optimal pH c. increasing the reaction temperature d. increasing the energy in the system e. increasing the activation energy
Which of the four postulates of Darwin's theory of evolution was not well established when On the Origin of Species was first published but is overwhelmingly supported today?
A) Individuals with advantageous traits survive longest and have the most offspring. B) Individuals in a population differ physically from one another in many ways. C) Some individuals in a population survive and reproduce better than do other individuals. D) Some differences among individuals in a population are due to genetics and are heritable.
When you move your fingers to turn the page, you are using the nervous system and
A) adipose tissue. B) skeletal muscle. C) cardiac muscle. D) simple epithelium. E) endocrine glands.
The partitions that separate the segments of the annelid body are known as
A. setae. B. pseudocoels. C. radula. D. septa. E. nephridia.