Birds are thought to have evolved from
dinosaurs. In considering birds and comparing
them to dinosaurs, which of the following
would be a derived trait?
a. feathers
b. legs
c. eyes
d. toothlessness
e. bones
D
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Trypanosomes that cause disease in humans escape destruction by the human immune system because they are resistant to phagocytosis.
Answer the following statement true (T) or false (F)
The process of cumulative causation
A) was developed by W.W. Rostow. B) leads to growth in regions affected by the backwash effect. C) involves a buildup of economic activity based on external economies and localization economies. D) critiques the core-periphery concept as meaningless in today's economically interdependent world.
The charge on amino acids in the active site of an enzyme would be affected by ___.
A. temperature B. substrate concentration C. pH D. antibiotics
When one atom loses an electron to another atom, it results in the formation of
A. a polar covalent bond and a new molecule. B. cations and anions that can form ionic bonds. C. a covalent bond between the two. D. many hydrogen bonds. E. a nonpolar covalent bond that is difficult to break.