The gonads are another name for the
a. parathyroid and thyroid.
b. ovary and testis.
c. adrenal cortex and medulla.
d. anterior and posterior pituitary.
e. testis only.
B
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What is the pattern component of the theory of chemical evolution?
A) Heat and electrical discharges were required for chemical evolution to occur. B) Most chemical evolution occurred at black smokers. C) The process occurred at black smokers, in the atmosphere and oceans, or in outer space. D) Increasingly complex carbon-containing molecules formed early in Earth history.
What is the key concept addressed by the question?
What will be an ideal response?
Chromatin that contains sequences that are not transcribed in any cell type is called
a. constitutive heterochromatin. b. facultative heterochromatin. c. constitutive euchromatin. d. facultative euchromatin.
When the theory of evolution by natural selection was first presented in 1858, authorship was credited to both Charles Darwin and ____.
A. Charles Lyell B. Alfred Wallace C. Georges Cuvier D. Jean-Baptiste Lamarck E. Thomas Malthus