Somites arise from
a. endoderm.
b. mesoderm.
c. ectoderm.
d. gastroderm.
e. placoderm.
B
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Because of continental drift, dinosaurs during the Jurassic Period were able to migrate freely from
a. Africa to Europe. b. Antarctica to Asia. c. Australia to Asia. d. South America to North America. e. South America to Africa.
A vast majority of scientists agree that disruption of the carbon cycle by human activities is altering the Earth’s climate and warming the planet
1.True 2.False
Which of the following is true of chemokines?
A. They ensure production of enough leukocytes. B. They are involved in B lymphocyte activation and differentiation. C. They are chemotactic factors for leukocytes. D. They cause basophils and eosinophils to degranulate. E. They are substances used to signal between leukocytes.
In terms of reproduction with which of the following statements, would you agree?
What will be an ideal response?