A normal Arabidopsis flower is composed of four concentric whorls. Which of the following is the correct order of whorls, starting from the outside and moving in?
A. carpels - stamens - petals - sepals
B. stamens - carpels - sepals - petals
C. petals - sepals - carpels - stamens
D. sepals - petals - stamens - carpels
E. carpels - petals - sepals -stamens
D. sepals - petals - stamens - carpels
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Davis, Weintraub, and Lasser found three genes that are involved in muscle differentiation by
A. eliminating all the gene candidates that were expressed in both muscle and nonmuscle cells. B. finding all the genes that were expressed in common between two different muscle cell lines. C. cloning all the genes that were expressed only in muscle cell lines to determine if any of these genes could cause non-muscle cells to differentiate into muscle cells. D. mutating genes expressed only in muscle cells to see if differentiation could be prevented.
Most pinnipeds mate:
a. every two years. b. every four years. c. once in their lifetime. d. annually. e. every three years.
In a normal atom, the atomic number tells you how many electrons you have
1.True 2.False
Why would intelligent design not be considered a scientific explanation for the origin of living things?
A) It is not a testable strategy. B) It is not a testable hypothesis. C) It is not a testable experiment. D) It is not a testable theory.